①
②
③
④
19+23=
5﹣1.6=
0.23÷0.1=
0.4×0.2=
=
÷0.25=
0.125×16= 1.04×5= 7×12÷7×120=
18.8×20%= ×0.55= 123+﹣123+=
①25×32×1.25
②(+0.375)÷(×)
③×+÷7
④6﹣(+)