KHAO SAT TOAN DAU NAM LOP 6

<span class='text_page_counter'>(1)</span>M«n To¸n ( thêi gian lµm bµi 90 phót ) .PhÇn tr¾c nghiÖm: (4 ®) Hãy khoanh vào chữ đặt trớc câu trả lời đúng. 1. Số thập phân có ba trăm linh hai đơn vị. 2. ,chÝn phÇn tr¨m ®ưîc viÕt lµ: Sè 2 2 gÊp sè 2 sè lÇn lµ : 3. 3 4. 3. Đếm từ 1 đến 100 có bao nhiêu lần xuất hiÖn ch÷ sè 6: Trong c¸c ph©n sè 3 ; 4 ; 5 vµ 7 5. 7. 9. 13. A. 302,9 B. 302,90 A. 4 lÇn B. 3 lÇn A. 20 lÇn B. 21 lÇn. C. 302,009 D. 302,09 C.2 lÇn D.5 lÇn C. 19 lÇn D. 18 lÇn C. 3. 5 A. 9. 5. ,ph©n sè lín nhÊt lµ : 5 6 7 8. B. 4 7 25% cña 72 lµ : A. 15 B. 25 Gi¸ trÞ cña x trong biÓu thøc A. x = 6 B. x =10,5 x + x : 5 = 12,6 lµ : Bèn n¨m liªn tiÕp cã tÊt c¶ bao nhiªu ngµy ? A. 1461 ngµy B. 2411 ngµy A. 600 m2 3 ha = ... m2 ?. D. 4 7. C. 18 D. 20 C.x =8,6 D. x =7,5 C. 365 ngµy D. 1410 ngµy C. 60 m2. 5. B. 6000 m2 II. PhÇn tù luËn: 16® C©u 1 :(4 ®) : a) Không quy đồng tử số và mẫu số .Hãy so sánh : 13 vµ 15 17. 19. D. 60000 m2. 12 48. vµ. 9 36. ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... b)Cho A= (100 x 44 + 50 x 64) x (37414,8 : 1000 + 2242,52 : 100) B= (16 x 14,96 x 25) x (27 x 38 + 19 x 146) Hãy tính A : B ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... .......................................................................................................................................

<span class='text_page_counter'>(2)</span> ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... 2. C©u 2: ( 2 ®iÓm ) T×m x: 1 – ( x – 7,25 ) : 8 3 = 0 ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... C©u 3: (3®) TÝnh nhanh a) 373737 727272. 2006 ×125+1000 126 ×2005 −888. b. 18 x ( 373737 424242. + 373737 565656. +. ). ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... .................................................................................................................................. Bài 4: (3 ®) T¹i mét kho g¹o, lÇn thø nhÊt ngêi ta xuÊt ®i 25 tÊn g¹o, lÇn thø hai ngêi ta xuÊt ®i 20 tÊn g¹o. Sè g¹o cßn l¹i trong kho b»ng 97% sè g¹o cã lóc ®Çu. Hái lóc ®Çu trong kho cã bao nhiªu tÊn g¹o ? ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... .......................................................................................................................................

<span class='text_page_counter'>(3)</span> ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... Bài 5: (4 ®) Cho tam giác ABC, điểm M nằm trên cạnh BC sao cho BM = 2MC, điểm N trên cạnh CA sao cho CN = 3NA. Tính diện tích tam giác ABC nếu biết diện tích của tam giác MNC bằng 9 cm2 ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ..................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... .................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... .......................................................................................................................................

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