Question

简便计算48×0.67+6.7×5.2？

Answer 1

48×0.67+6.7×5.2
=48×0.67+0.67×52
=（48+52）×0.67
=100×0.67
=67

Answer 2

=38×0.67+0.67×62 =0.67×（38+62）=0.67×100 =67 解法分析：提取公因数0.67，利用乘法分配律逆用，按照四则运算法则进行运算，同级运算按顺序计算，不同级运算