脱式简便运算四年级
脱式简便运算四年级
日期：2021-03-31 05:23:28 人气：1
简便计算：
16x25
=16x5x5
=80x5
=400
16x125
=4x4x125
=125x4x4
=500x4
=2000
28x25
=28x5x5
=140x5
=700
32x125
=4x8x125
=125x4x8
=500x8
=4000
16x25
=16x5x5
=80x5
=400
16x125
=4x4x125
=125x4x4
=500x4
=2000
28x25
=28x5x5
=140x5
=700
32x125
=4x8x125
=125x4x8
=500x8
=4000