① a×0.6 ② a÷0.6 ③ a×0.8 ④ a÷0.8
720.5=36 720.5=144 72.5=48 721.5=108
1.8×23=
0.37×0.4=
1.06×25=
4×2.5÷2.5×4=
0.77÷1.1=
9.6÷16=
0.48÷0.03=
4.5+5.5×0=
6.5×1.1〇6.5 4.3÷1.2〇4.3
1.04×3.57〇35.7×0.14 0.82×0.98〇0.82
3.6×1.4= 360×1.4= 50.4÷1.4=。
0.100.1×0.1 2.5÷52.5 3.2÷1.632÷16