41.2乘8.1加上11乘1.25加53.7乘地1.9用简便方法怎么计算

Question

忘各位大哥哥帮助一下

Answer 1

41.2×8.1＋11×1.25＋53.7×1.9=41.2×(10-1.9)+53.7×1.9+11×1.25=412+12.5×1.9+1.1×12.5 =412+12.5×(1.1+1.9)=412+12.5X3=449.5