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0.25×4.78 3.4×9+3.4 2.7×4.3+2.7×5.7 1.25×11×0.8 4.6×102 用简便方

来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/14 05:39:25
0.25×4.78 3.4×9+3.4 2.7×4.3+2.7×5.7 1.25×11×0.8 4.6×102 用简便方法计算的,
0.25×4.78×4
0.25×4.78 3.4×9+3.4 2.7×4.3+2.7×5.7 1.25×11×0.8 4.6×102 用简便方
0.25×4.78
=0.25×(4+0.78)
=0.25×4+0.25×0.78
=1+0.195
=1.195
3.4×9+3.4
=3.4×(9+1)
=3.4×10
=34
2.7×4.3+2.7×5.7
=2.7×(4.3+5.7)
=2.7×10
=27
1.25×11×0.8
=1.25×0.8×11
=1×11
=11
4.6×102
=4.6×(100+2)
=4.6×100+4.6×2
=460+9.2
=469.2
0.25×4.78×4
=0.25×4×4.78
=1×4.78
=4.78