口算
1.23÷3= 1.7×0.4= 0.36÷12= 1.6+0.38= 0.8×11= 1﹣0.75=
1.2÷0.3= 0.75×4= 15×0.4= 2.14﹣0.9= 4×0.25= 10÷2.5=
0.4×52= 1.6×0.4= 9.6÷6= 0.6÷0.5= 0.125×8= 0.38×1000=
0÷3.5×0.2= 0×9.7+2.3= 1.6×9+1.6= 3.8+1.2= 4.8÷0.3= 530+270=
0.51+1.7= 7.6÷3.8= 92÷2.3= 9.6﹣1.6= 7.2+2.8= 2.63+0.37=