156×19-19×55 的简便计算

问题描述:

156×19-19×55 的简便计算

=19×(156-55)
=19×101
=19×(100+1)
=19×100+19×1
=1919

156×19-19×55 的简便计算
= 19 x ( 156 - 55 )
= 19 x 101
= 19 x (100+1)
= 19 x 100 + 19 x1
= 1900 + 19
= 1919
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156×19-19×55
=(156-55)x19
=(100+1)x19
=100x19+1x19
=1900+19
=1919