| 800-250= | 30×40= | 8100÷900= | 10-0.98= | 105÷7= | 560+770= | ||||||||||||
| 0.25×0.4= | 6.3÷0.07= | 0.64÷8= | 8.85×10= | 4.73+0.7= |
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| 3.6×
| 8×1.36×1.25= | 7.2×2.8+2.8×0.8= |
| 800-250=550， | 30×40=1200， | 8100÷900=9， | 10-0.98=9.02， | 105÷7=15， | 560+770=1330， | ||||||||||||||||||
| 0.25×0.4=0.1， | 6.3÷0.07=90， | 0.64÷8=0.08， | 8.85×10=88.5， | 4.73+0.7=5.43， |
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| 3.6×
| 8×1.36×1.25=13.6， | 7.2×2.8+2.8×0.8=22.4． |