Question

下面各题,怎样简便就怎样算,⒈(3618除以18减去145)乘以29⒉ 36乘以(十二分之十一减去九分之七)

Answer 1

(3618÷18-145)×29

=(201-145)×29

=56×29

=56×(30-1)

=56×30-56×1

=1680-56

=1624

36×(11/12-7/9)

=36×11/12-36×7/9

=33-28

=5