4.7×2.8+3.6×9.4 追加200分!

问题描述:

4.7×2.8+3.6×9.4 追加200分!
六点三十之内给我答复

4.7×2.8+3.6×9.4
=4.7×2.8+3.6×4 .7×2
=4.7×2.8+7.2×4 .7
=4.7×(2.8+7.2)
=4.7×10
=47