⑴1.35-0.5= 8.6-6= 7.67-3.63= 49.36+1.74=
⑵0.2×0.5= 0.24×5= 1.25×8×3= 2.5×0.7×4=
⑶14.4÷12= 1÷0.001= 23÷45= 11÷13=
⑷0.33= 1.32= 8.2-7.2×0.5= 5×0.5÷5×0.5=
202.2÷0.4= 13÷7= 6.7+4.3-1.53=
0.8³= 6-6÷5= 1.8×0.5÷1.8×0.5=
÷3=
1-0.5=
×24=
+×=
768+199=
0.5÷0.25=
2.3×9+2.3=
2.5×7×4=
7÷12= 4÷6= 21÷49= 12.5×4=
5.5×200= 25÷0.05= 1.6÷3.2= 48×0.02=
8÷4=
4÷8=
70分=小时。