Question

12.5×7.5+0.13×125+12.5。的简便运算？

Answer 1

12.5×7.5+0.13×125+12.5

=12.5×7.5+1.3×12.5+12.5

=12.5×（7.5+1.3）+12.5

=12.5×8.8+12.5

=12.5×（8+0.8）+12.5

=12.5×8+0.8×12.5+12.5

=100+10+12.5

=110+12.5

=122.5

Answer 2

简便计算：
12.5×7.5+0.13×125+12.5
=12.5×7.5+1.3×12.5+12.5
=12.5×(7.5+1.3+1)
=12.5×9.8
=12.5×(10-0.2)
=125-2.5
=122.5

Answer 3

12.5*7.5+0.13*12.5*10+12.5=12.5*7.5+1.3*12.5+12.5=12.5*（7.5+1.3+1）=12.5*9.8=12.5*（10-0.2）=125-2.5=122.5

Answer 4

解:可以将125运用乘法分配律化为12.5x10同0.13连乘，提取12.5，然后按四则运算法则进行计算。计算过程
12.5x7.5+0.13ⅹ125+12.5
=12.5x7.5+0.13ⅹ12.5ⅹ10+12.5
=12.5ⅹ(7.5+1.3+1)
=12.5ⅹ9.8
=122.5。

Answer 5

=12.5*7.5+1.3*12.5+12.5
=（7.5+1.3+1）*12.5
=9.8*22.5
=122.5