Question

0.9x24.5-10.8请问简便方法怎么算？

Answer 1

括号1减0.1乘以24.5减去10再减去0.8

Answer 2

0.9×24.5-10.8
=0.9×24.5-0.9×12
=0.9×（24.5-12）
=0.9×12.5
=（1-0.1）×12.5
=12.5-1.25
=11.25
或者：
0.9×24.5-10.8
=（1-0.1）×24.5-10.8
=24.5-2.45-10.8
=24.5-（2.45+10.8）
=24.5-13.25
=11.25