(得数保留两位小数)
5.08×2.6= ☆2.32×7.5= 1.05×1.6≈(得数保留一位小数)
5.2×6.4+4.8×6.4 0.5×4.8×1.25 6.36×7.5+0.75×36.4
0.78×101 5.4×3.2+3.2×4.6 1.25×32×2.5
8.72×101-8.72 2.5×12.5×40×0.8
8.4×0.6+9.4 | 32×1.25×0.25 |
3.75×10.2 | 3.9×8.2+1.8×3.9 |
1.25×1.97×0.8 0.67×101 88×5.6+5.6×12
15.6-6.03÷0.67 7.2×17.3+2.7×7.2 0.64×101
⑴5.6-1.2-2.8+4.4 ⑵7.86×101-7.86
8.52﹣(5.52+0.9) | 4×(9.3﹣5.7)+3.6 |
7.5×101 | (0.38+0.38+0.38+0.38)×2.5 |
7.08×2.7+7.08×7.3 2.33×1.25×8 3.14×102
23.5×17.6-23.5×7.6 2.5×3.2×1.25 7.5+2.5×4 43.56×7.2+7.2×57.44-7.2