【推荐1】直接写出得数。
1.4÷0.14=            0.24÷ 0.1=             0.54÷0.06=        0÷0.9=

【推荐2】口算我最行．
0.3+0.6=             0.8-0.4=                    0.9-0.5=                    0.4+0.4=             1.1+0.3=
2.8-0.5=             0.9-0.8=                    1.1-0.8=                    0.7+0.2=

【推荐3】口算。
3.6÷1.2=               0.72÷0.9=                 3÷8=                         5.6÷1.4=
0.2×0.6=               4.6÷0.46=                 0.52÷52=                  7.1÷0.1=
7.2÷0.4=               1÷0.25=                    0.78÷6=                    2.4÷24=
5.5÷11=                 6.6÷0.6=                  0.18÷2=                    34÷0.2=
6÷5=　　　          0.2÷0.4=                  1.6÷0.8=                    4.2÷2.1=