5.2÷0.01= 1.5÷30= 4.5÷0.5= 10.8－2.9－5.1=
0.06×0.8= 1.25×0.8= 0.3÷6= 1.8×4＋1.8=
2.66－0.4×0.25= 4×（1.5＋0.25）=
