用简便方法计算2.25×35+2.75÷123+60%3.25×734−314+314×3.250.2×32×0.125．

Question

用简便方法计算
2.25×(3)/(5)+2.75÷1(2)/(3)+60%                 
3.25×7(3)/(4)−3(1)/(4)+3(1)/(4)×3.25
0.2×32×0.125．

Answer 1

①2.25×(3)/(5)+2.75÷1(2)/(3)+60%
=2.25×(3)/(5)+2.75×(3)/(5)+(3)/(5)
=(3)/(5)×（2.25+2.75+1）
=(3)/(5)×6
=3.6
②3.25×7(3)/(4)−3(1)/(4)+3(1)/(4)×3.25
=3.25×7.75-3.25+3.25×3.25
=3.25×（7.75-1+3.25）
=3.25×10
=32.5
③0.2×32×0.125
=（0.2×4）×（8×0.125）
=0.8×1
=0.8