Question

巧算 4.4×28.6+41.1×5.6=

Answer 1

=4.4×28.6+(28.6+12.5)×5.6

=4.4×28.6+28.6×5.6+12.5×5.6

=(4.4+5.6)×28.6+12.5×8×0.7

=286+70=356

第二题类似,把28.8拆成（26.3+2.5）,以下相同