31.5×0.931.5;
5.42×0.95.42;
0.98×10.98;
2.5×0.82.5;
3.56×1.013.56;
4.95×14.95.
把下面的数填在合适的圈里.
1 2 3 4 5 6 8 12 18 24 30 36 72 90.
8÷0.1= 6÷7= + = - =
7.8-0.08= 0.6×0.5= 1- = 18÷36=