13.7÷12.5÷0.8 3.25×8.4+6.75×8.4 (8.1-5.4)÷3.6+8513.7÷12.5÷0.8 3.25×8.4+6.75×8.4(8.1-5.4)÷3.6+85.7
问题描述:
13.7÷12.5÷0.8 3.25×8.4+6.75×8.4 (8.1-5.4)÷3.6+85
13.7÷12.5÷0.8
3.25×8.4+6.75×8.4
(8.1-5.4)÷3.6+85.7
答
1) 13.7÷12.5÷0.8
=13.7÷(12.5×0.8)
=13.7÷10
=1.37
2) 3.25×8.4+6.75×8.4
=(3.25+6.75)×8.4
=10×8.4
=84
3)(8.1-5.4)÷3.6+85.7
=2.7÷3.6+85.7
=0.75+85.7
=86.45