10.63-2.53-3.47+8.54.12.5乘6.4 乘0.25能巧算就巧算
问题描述:
10.63-2.53-3.47+8.54.12.5乘6.4 乘0.25能巧算就巧算
答
10.63-2.53-3.47+8.54
=10.63-(2.53+3.47)+8.54
=10.63-6+8.54
=4.63+8.54
=13.17
12.5乘6.4 乘0.25
=12.5*0.8*8*0.25
=10*2
=20