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分数四则混合运算

分数四则混合运算. 复习. 整数四则混合运算的顺序是什么?. ( 1 )一个算式里,如果只含有同一级运算, 按照从左往右的顺序进行计算.. ..... ( 2 )一个算式里,如果含有两级运算,要先 算第二级运算,再算第一级运算.. .. .. ( 3 )一个算式里,如果有括号,要先算小括 号里面的,再算中括号里面的.. . .. . .. +. ÷. 1. 1. 1. 1. 1. 1. 1. 1. 2. 2. 3. 2. 3. 2. 2. 3. +. ×.

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分数四则混合运算

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  1. 分数四则混合运算

  2. 复习 整数四则混合运算的顺序是什么? (1)一个算式里,如果只含有同一级运算, 按照从左往右的顺序进行计算. .... (2)一个算式里,如果含有两级运算,要先 算第二级运算,再算第一级运算. . . (3)一个算式里,如果有括号,要先算小括 号里面的,再算中括号里面的. . . . .

  3. ÷ 1 1 1 1 1 1 1 1 2 2 3 2 3 2 2 3 + × = + = 2 3 2 1 = 3 3 2 新授 计算 + ÷ 这个算式里含有几级运算? 两级 应该先算什么,再算什么? 先做除法后做加法

  4. 1 1 想 5 5 2 1 3 13 新授 [( ) ] 计算 ÷ + × 这个算式里既有小括号,又有中括号,应该怎样计算? 计算时,要先算小括号里面的,再算中 括号里面的,最后算括号外边的

  5. [( ) ] ÷ + × 1 1 1 1 1 1 1 5 5 5 5 5 5 5 10 13 [( ) ] ÷ + × = 15 15 [ ] ÷ × = 2 2 3 = 1 1 1 3 1 1 3 3 ÷ = 15 15 13 13 13 13 新授 [( ) ] 计算 ÷ + ×

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