0.7+2.61.9+2.6
2.8+3.63.6+2.8
4-3.5+0.54-(3.5+0.5)
7.5-3.3+0.57.5-0.5+3.3
0.81+1.19=
8×0.125
5.3×10+4.7×10=
12.5×4×8=
10÷0.4=
2.5×4÷2.5×4=
185+35=
6.4-3.8=