题目内容
计算:172.4×6.2+2724×0.38.
172.4×6.2+2724×0.38
=172.4×6.2+(1724+1000)×0.38,
=172.4×6.2+1724×0.38+1000×0.38,
=172.4×6.2+172.4×3.8+380,
=172.4×(6.2+3.8)+380,
=172.4×10+380,
=1724+380,
=2104.
=172.4×6.2+(1724+1000)×0.38,
=172.4×6.2+1724×0.38+1000×0.38,
=172.4×6.2+172.4×3.8+380,
=172.4×(6.2+3.8)+380,
=172.4×10+380,
=1724+380,
=2104.
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