172.4乘以6.2加1724乘以0.38的简便运算

问题描述:

172.4乘以6.2加1724乘以0.38的简便运算

172.4×6.2+1724×0.38=172.4×6.2+172.4×3.8=172.4×(6.2+3.8)=172.4×10=1724