8.7－1.9－3.1= 0.7×16–16×0.3=
（12.5＋1.25）×0.8= （5.6＋3.5）÷0.7=
9.1÷4－3.1÷4= 8.92－0.03－1.97=
0.175÷0.25÷4= 0.8×0.8×0.5=
12.5÷0.25＋7.5×4= 42÷4－32×0.25=
5.6×0.125＋4.4÷8= 2.4×0.7＋24×0.03=
5.4＋3.2＋4.6= 8.4×0.5－5.4÷2=
18.7－（9.9＋8.7= 25.4－（19.8－4.6=
4.5－1.25－0.75－0.5= 5.7×0.5－1.7×0.5
(12.6－0.75－0.25) ÷0.01= 4.8÷0.6＋4.8÷0.4=