9.47×0.999.47 3.7÷1.993.7 7.2×0.960.72×9.6
3×0.7=2.1 3.3×6.7=22.11 3.33×66.7=222.111 3.333×666.7=
7.8+2.2×1.5
10.58﹣2.42﹣7.58
30﹣14÷2.5×4
7.3×7.3﹣7.3+7.3×3.7
8×(1.25+2.5)×4
9÷[(6.4+3.6)×1.8÷0.1]
a×12=
b×b=
a×b=
x×y×7=
5×x=
2×c×c=
7x×5=
2×a×b=
a·a=
6×m×7n=
8a×9b×10c=
a×a×a=
周一
周二
周三
周四
5095
4880
4016
5980
( )
3.2÷0.01= 5.6+3.99= ÷ =
× = 4.1+1÷2=