题目列表(包括答案和解析)
| 6.8-1.36-0.64 | 21.9+（15.7+18.1） | （2.5×73）×0.4 | ★9×（7000÷63） |
| 5.6×1.25 | ★11.1÷0.25 | 457÷25÷4 | 2.6+7.7+7.4+3.3 |
| 0.2×1.8×0.5×10 | ★21÷1.25 | ★（8700+870+87）÷87 | 5.3×4.9+5×5.3． |
| 24×5= | 70×8= | 250÷5= | 14×40= | 880÷8= | 40×8= | 57-28= |
| 810÷90= | 120+20= | 250÷1= | 28+68= | 100×0= | 350÷60= | 18×3= |
| 90÷15= | 17×4= | 420÷6= | 280+40= | 505÷5= | 48÷4= | 51×29≈ |
| 352÷7≈ | 448÷9≈ | 240÷6= | 900÷9= | 21×40= | 79×60= | 630÷6= |
| 24×5= | 70×8= | 250÷5= | 14×40= | 880÷8= | 40×8= | 57-28= |
| 810÷90= | 120+20= | 250÷1= | 28+68= | 100×0= | 350÷60= | 18×3= |
| 90÷15= | 17×4= | 420÷6= | 280+40= | 505÷5= | 48÷4= | 51×29≈ |
| 352÷7≈ | 448÷9≈ | 240÷6= | 900÷9= | 21×40= | 79×60= | 630÷6= |
| 37-21= | 850÷100= |  = |  = |
 = |  = | 12×5= | 4.4×1.1= |
 = |  = | 36÷3= | 3-2.55= |
 = |  = | 210×10= |  = |
 = | 0.95=________% | 9.5-8.7= |  = |
0÷ = | 1.12=________% | 0.6+0.13= |  = |
2× = |  =________% | 0.4×0.9= |  = |
 = |  =________% | 2.4÷0.3= |  = |
 ×24= | 75%= | 1.2-1.16= |  = |
| 9÷8= | 15%=． |
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