91乘9加91用简便算式计算

Question

如题所述

Answer 1

91×9+91

=91×9+91×1

=91×（9+1）

=91×10

=910

考点：乘法分配律

知识：

a×b+a×c

=a×（b＋c）

91×9+91=91×9+91×1

得数不变

比如

1+1=1+1×1

例题：1×9+1=1×9+1×1

        =1×（9+1）

        =1×10

        =10

Answer 2

图

Answer 3

91x9加9

=91x9加1

=91x10

=910

Answer 4

=91*(9+1)
=91*10
=910

Answer 5

91X9+91
=91X(9+1)
=91X10
=910