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简便计算3.7×4.6+6.3×4.68.8×0.1250.34×99+0.344×1.98×0.25101×0.247.25×0.35-7.25×0.25
题目详情
简便计算
3.7×4.6+6.3×4.6 | 8.8×0.125 | 0.34×99+0.34 |
4×1.98×0.25 | 101×0.24 | 7.25×0.35-7.25×0.25 |
▼优质解答
答案和解析
(1)3.7×4.6+6.3×4.6
=(3.7+6.3)×4.6
=10×4.6
=46;
(2)8.8×0.125
=(8+0.8)×0.125
=8×0.125+0.8×0.125
=1+0.1
=1.1;
(3)0.34×99+0.34
=0.34×(99+1)
=0.34×100
=34;
(4)4×1.98×0.25
=4×0.25×1.98
=1×1.98
=1.98;
(5)101×0.24
=(100+1)×0.24
=100×0.24+1×0.24
=24+0.24
=24.24;
(6)7.25×0.35-7.25×0.25
=7.25×(0.35-0.25)
=7.25×0.1
=0.725.
=(3.7+6.3)×4.6
=10×4.6
=46;
(2)8.8×0.125
=(8+0.8)×0.125
=8×0.125+0.8×0.125
=1+0.1
=1.1;
(3)0.34×99+0.34
=0.34×(99+1)
=0.34×100
=34;
(4)4×1.98×0.25
=4×0.25×1.98
=1×1.98
=1.98;
(5)101×0.24
=(100+1)×0.24
=100×0.24+1×0.24
=24+0.24
=24.24;
(6)7.25×0.35-7.25×0.25
=7.25×(0.35-0.25)
=7.25×0.1
=0.725.
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