6.8乘括号16.8减7.8括号加6.8怎么做要简算的
问题描述:
6.8乘括号16.8减7.8括号加6.8怎么做要简算的
答
6.8X(16.8-7.8)+6.8
=6.8X(16.8+1-7.8)
=6.8X10
=68
1.25X7+1.25-6.7
=1.25X(7+1)-6.7
=1.25X8-6.7
=10-6.7
=3.3