3.8乘以9.9乘以0.38怎样算简便

2025-03-19 11:08:21
推荐回答(1个)
回答1:

3.8×9.9+0.38
=3.8×9.9+3.8×0.1
=3.8×(9.9+0.1)
=3.8×10
=38
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