2.3×2= 10×0.2= 1.45×10= 5.98×1000=
2.4×5= 4.5×0.9= 2.5 ×8= 3.9-3=
5.6÷7= 12÷0.3= 0.24÷8= 1.2×6=
0.64÷4= 0.8÷0.01= 1÷0.5= 0×0.05÷1.5=