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=