2.4÷0.22.4 32.8÷0.2532.8×4
9.2×1.19.2÷1.1 1.561.56×0.28
3.2a﹣0.2a=
2.8+3.5=
10﹣2.3=
0.25×40=
0.45÷0.3=
1.1×0.9=
1.6÷0.1=
1.5÷0.05=
9.7﹣4.65=
28.5÷0.15=
1.7×0.24≈(得数保留两位小数)
8.52﹣(5.52+0.9)
4×(9.3﹣5.7)+3.6
7.5×101
(0.38+0.38+0.38+0.38)×2.5