84乘25的简便方法

‘壹’ 84*25 有几种简便运算方法

(100-4X4)X25
=2500-4X4X25
=2500-4X100
=2100
（80+4）X25
=80X25+4X25
=20X4X25+100
=2000+100
=2100
84*25
=84*25X4/4
=84/4X100
=21X100
=2100

‘贰’ 84乘25的简便计算

（8+4）x25
=8x25+4x25
=200+100
=300

‘叁’ 84x25 用简便方法计算

84x25 用简便方法计算
=25x4x21
=100x21
=2100

‘肆’ 84×25简便方法

答案

‘伍’ 简便运算25x84

注意熟记:
5×2=10，25×4=100，125×8=1000
25×84
=25×4×21
=100×21
=2100

‘陆’ 简便计算84*25。

解84*25
=21×4×25
=21×100
=2100

‘柒’ 84×25简便运算

84×25
=84×5×5
=420×5
=2100

‘捌’ 25乘（84）用简便方法计算

用简便方法计算
25×84
=25×4×21
=100×21
=2100

‘玖’ 84乘以25用简便方法怎么算

80乘以25+4乘以25

‘拾’ 84乘25的简便计算

80X25+4X25=2100