四年级下册计算题知识竞赛及答案(7)
时间:2025-07-09
时间:2025-07-09
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74+5.8+26+4.2 560-86-114
=(74+26)+(5.8+4.2)= 560-(86+114)= 100+10 = 560-200
= 110 = 360
542×7+158×7 99×73+73
= (542+158) ×7 = (99+1) ×73 = 700×7 = 100 ×73
= 4900 = 7300
38×5-522÷3 63×12÷(38-29)= 190-522÷3 = 63×12÷9
= 190-174 = 756÷9
= 16 = 84
6400÷4÷25 156+187÷17×4= 6400÷(4×25) = 156+11×4
= 6400÷100 = 156+44
= 64 = 200
25×32×125 91-25×3+143= 25×(4×8)×125 = 91-75+143
= (25×4)×(8×125) = 16+143
= 100×1000 = 159
= 100000
101×38 399×25
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