0.7×1.20.7 3.3×0.53.3×1.2 2.3×0.12.3÷10
1kg30g+680g 10t-8t350kg
50÷4×5(50+4)×5 72-24÷12(72-24)÷12
153-46-34153-(46+34) 540÷9÷5540÷(9×5)