7.93乘6.74减(7.43减0.69)乘7.9简便方法计算
问题描述:
7.93乘6.74减(7.43减0.69)乘7.9简便方法计算
答
7.93×6.74-(7.43-0.69)×7.9
=7.93×6.74-6.74×7.9
=7.93×(6.74-6.74)
=0