1.2×0.4 0.4×13-4×0.3简便方法?
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发布时间:2022-06-18 08:00
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热心网友
时间:2023-11-28 14:19
1.2×0.4+0.4×13-4×0.3简便方法:
1.2×0.4+0.4×13-4×0.3
=1.2×0.4+0.4×13-0.4×3
=(1.2+13-3)×0.4
=11.2×0.4
=4.48
热心网友
时间:2023-11-28 14:20
用结合律凑整。
1.2×0.4+0.4×13-4×0.3
=0.4×1.2+0.4×13-0.4×3
=0.4×1.2+0.4×10
=0.48+4
=4.48
热心网友
时间:2023-11-28 14:20
1.2×0.4+0.4×13-4×0.3
=1.2×0.4+0.4×13-0.4×3
=4.8+0.4×(13-3)
=4.8+0.4×10
=4.8+4
=8.8