发布网友 发布时间:2024-10-23 21:17
共2个回答
热心网友 时间:2024-11-19 09:13
脱式计算,即递等式计算,把计算过程完整写出来的运算,也就是脱离竖式的计算。
①2.5×1.6
=(2+0.5)×1.6
=2×1.6+0.5×1.6
=3.2+0.8
=4
②12.5×10.1
=12.5×(10+0.1)
=12.5×10+12.5×0.1
=125+1.25
=126.25
③1.6×1.25
=1.6×(5÷4)
=1.6÷4×5
=0.4×5
=2
④12.5×9.9
=12.5×(10-0.1)
=12.5×10-12.5×0.1
=125-1.25
=123.75
热心网友 时间:2024-11-19 09:10
4题吗