| 简算. 1.25×10.7×8 10-(0.56×8.3+0.44×8.3) 49.8×2.73+2.73×50.3+0.273 1414÷3.5. |
| (1)1.25×10.7×8, =1.25×8×10.7, =10×10.7, =107; (2)10-(0.56×8.3+0.44×8.3), =10-8.3×(0.56+0.44), =10-8.3×1, =1.7; (3)49.8×2.73+2.73×50.3+0.273, =2.73×(49.8+50.3)+0.273, =2.73×100.1+0.273, =2.73×100+2.73×0.1+0.273, =273+0.546, =273.546; (4)1414÷3.5, =(1414×2)÷(3.5×2), =2828÷7, =404. |
关注公众号回复:奥数答案
即可免费获得密码查看答案
