(3.5+2.5)×=3.5×+×4
4.87×99=4.87×(-)
7.6×1.9﹣96.2÷7.4
2.54×10.1﹣0.254
2.5×7.9×0.4
3.79÷0.125÷0.8
72.8÷5.6+14.9 1.35×2.5+2.65×2.5 1.4÷0.8÷12.5
8.7÷0.2÷0.5 0.5×16.3+0.5+3.7×0.5