Question

4.78乘14+270.56除89怎么简便计算？

Answer 1

4.78x14+270.56÷89
= 4.78x14+270.56/89
【第二项用89约分】
=4.78x7x2 +3.04
=33.46x2 +3.04
=66.92+3.04
=69.96

Answer 2

4.78×14+270.56÷89
=4.78×10+4.78×4+267÷89+3.56÷89
=47.8+5×4-0.22×4+3+0.04
=47.8+23-（0.22-0.04）
=70.8-0.18
=70.62