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《 小数加减法简便运算 》 —— 组织者:胡小平

《 小数加减法简便运算 》 —— 组织者:胡小平. 口算 : 9847+52+48 75+139+61+225 8368 - 273 - 27. 口算 : 9847+52+48 9847+ ( 52+48 ) 75+139+61+225 ( 75+225 ) + ( 139+61 ) 8368 - 273 - 27 8368 - ( 273+27 ). 计算:. 0.4 + 0.8 0.8 + 0.4

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《 小数加减法简便运算 》 —— 组织者:胡小平

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  1. 《小数加减法简便运算》 —— 组织者:胡小平

  2. 口算: 9847+52+48 75+139+61+225 8368-273-27

  3. 口算: 9847+52+48 9847+(52+48) 75+139+61+225 (75+225)+(139+61) 8368-273-27 8368-(273+27)

  4. 计算: 0.4+0.8 0.8+0.4 (2.6+5.3)+1.7 2.6+(5.3+1.7) 14.6-5.7-4.3 14.6-(5.7+4.3)

  5. 计算: 0.4+0.8 =0.8+0.4 (2.6+5.3)+1.7 =2.6+(5.3+1.7) 14.6-5.7-4.3 = 14.6-(5.7+4.3)

  6. 试一试: 4.8+8.63+5.2+0.37 3.07-0.38-1.62 7.66 -(1.66 +2.35)

  7. 在括号里填上适当的数,使这道题可以进行简便运算在括号里填上适当的数,使这道题可以进行简便运算 8.68 +4.3 +( ) 9.87 -( ) -3.59

  8. 用简便方法计算下面各题 1.57+0.245+7.43+2.755 2.66-0.134-0.866 23.4-0.8-13.4-7.2

  9. 仔细观察比较A、B两组数据的特点,请你选择其中的一组进行计算。仔细观察比较A、B两组数据的特点,请你选择其中的一组进行计算。 A B 6.04+3.6+1.98 6.02+3.6+1.98 1.28+3.7+2.71+6.3 1.29+3.7+2.71+6.3 5.82+6.74-5.74-1.83 5.83+6.74-5.74-1.83

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