20-3.2-6.8 2.38+2.38×99
5.12×(9.6 ÷2.4) 84.5÷0.25÷0.4
(7.5+2.5×2)×1.4 1.25×3.48×0.08÷0.1
8.7+1.3-0.65+0.35 3.7×10.3-3.7×0.3
8.8×3.7+6.3×8.8
(7.6﹣3.6÷2)×1.5
4.4×2.5
0.25×3.2×12.5
10.6×55.4﹣55.4×0.6
3.7×10.2
1.2÷0.75+18.4
27.5÷2.5÷0.4
(30﹣19.8)÷0.5+31.2
(2.1+0.54)÷0.2
7.4×0.56+0.44×7.4
9.4×10.1
100÷(1.25÷1.5)
①4.05÷1.5÷0.3
②3.2÷0.2+3.2÷0.8
③1.25×32×2.5
④3.7×8.3+0.83×63