两位数乘以两位数速算法五种以上(两位数乘以两位数哪种方法最快)

两位数乘以两位数速算法五种以上(两位数乘以两位数哪种方法最快)

首页维修大全综合更新时间:2024-01-22 03:18:12

两位数乘以两位数速算法五种以上

12×11

=120+12

=132

48×25

=12×4×25

=12×100

=1200

88×13

=8×11×13

=8×143

=1144

55×99

=55×(100–1)

=5500–55

=5445

78×55

=70×55+8×55

=3850+440

=4290

大家还看了
也许喜欢
更多栏目

© 2021 3dmxku.com,All Rights Reserved.