8.42×4×2.5 5.2×7.8-6.8×5.2
(1.25-0.125)×8 99×2.4
3.45×102 (1.72+1.72+1.72+1.72)×2.5
3.17+0.83×1.6 70.8×0.27+7.08×7.3
(4.3-0.5)×0.125
6.2×3.8 + 6.2×6.2 8.45-0.45×0.1 125×3.2×25
0.73×102 25×(4+8) ×125 76.3×27-7.63×170
8.4×0.6+9.4
32×1.25×0.25
3.75×10.2
3.9×8.2+1.8×3.9
5.2×6.4+4.8×6.4 0.5×4.8×1.25 6.36×7.5+0.75×36.4
①0.8×62.3×12.5 ②99×7.4+7.4 ③0.64×45+3.6×4.5
50.3+2.7×0.2 3.9×5.2+3.9×4.8
21.23-4.1×0.6-6.54 12.5×7.5×0.4×0.8
[10-(5.3+3.9)]×8.5 0.57x 99