5.3÷1.25.3 0.67÷0.80.67 0.452÷1.44.52÷14
0÷24.624.6 5.46÷61 9.34÷0.28.34÷0.2
5.4÷8.81 9.1×0.79.1÷0.7 7.4÷0.17.4×10 x÷7.8x÷7.6(x不等于0)
0.72÷0.8= 27.9÷30= 1.6×2.5= 9.6÷0.6=
140×0.6= 7.2×0.7= 0.25×0.6= 0.86×2=
19﹣1.7= 2.4÷0.04= 496+298= ×0.2=
9.7+0.03= ÷1.75= 1×÷= +÷+=