+= ﹣= 3.5×= 2÷0.5=
﹣0.5= +3= ×= 0.8×=
0.23+177%= 2.5×40= 1÷= ×÷×=
3.8+0.75= +0.625= ﹣= 2÷0.04= 0.45×80=
87﹣49= 450÷0.9= 34÷7= 6.25×40= 4.3×=