Dạng 4. Thực hiện phép tính (tiếp theo) có đáp án
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2261 lượt thi
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23 câu hỏi
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45 phút
Danh sách câu hỏi
Câu 1:
(−98).15 =(−100+2).15=(−100).15+2.15 =−1500+30 =−1470
Câu 2:
35(−12) =35(−10−2) =35.(−10)+35.(−2) =−350−70 =−420
Câu 3:
(−53).21 =(−53).(20+1) =(−53).20+(−53).1 =−1060−53 =−1113
Câu 4:
(−17).101 =(−17).(100+1) =−1700−−17 =−1717
Câu 5:
(−4).2.6.25.(−7).5 =[(−4).25].(2.5).[6.(−7)] =(−100).10.(−42) = 42000
Câu 6:
(−32).125.(−9).(−25) =(−8).4.125.(−9).(−25)
=[(−8).125].[4.(−25)].(−9) =(−1000).(−100).(−9) =−900000
Câu 7:
47.69−−31.(−47) =47.69+31.47 =47(69+31)
=47.100 =4700
Câu 8:
(−56)+8.(11+7) =(−56)+8.11+8.7 =(−56)+88+56
=[(−56)+56]+88=88
Câu 9:
44.(−50)−50.56 =(−50)(44+56) =(−50).100 =−5000
Câu 11:
−67.(1−301)−301.67 =−67.1+67.301−−301.67 =−67
Câu 12:
(−3879−3879−3879−3879).(−25) =(−3879).4.(−25) =(−3879).[4.(−25)] =−3879.(−100) =387900
Câu 15:
45.(−24)+(−10).(−12) =45.(−24)+(−5).2(−12) =45.(−24)+(−5).(−24)
=(−24).(45−5) =(−24).40 =−960
Câu 16:
(−134)+51.134+(−134).48 =134.(−1)+51.134+134.(−48)
=134[(−1)+51(−48)] =134.2=168
Câu 17:
(−41)(59+2)+59(41−2) =(−41).59+(−41).2+59.41−59.2 =[(−41).59+59.41]+[(−41).2−59.2] =0+2(−41−59)
=2.(−100)=−200
Câu 18:
369.(−2)−41.82 =41.9(−2)−−41.82 =41(−18−82) =41.(−100)=−4100
Câu 19:
(135−35).(−37)+37.(−42−58) =(−100).(−37)+37(−100)
=3700−−3700=0
Câu 20:
(−7).(−7).(−7).(−7).(−7).(−7) = (−7)6=76
Câu 21:
(−4).(−4).(−4).(−5).(−5).(−5)= (−4)3.(−5)3=203
Câu 22:
(−8).(−2)3.125 = (−2)3.(−2)353=203
Câu 23:
27.(−2)3.(+343) = 33.(−2)3.73=(−42)3