(经典)异分母分数加减法练习题精品名师资料.pdf

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一、口算。结果请用最简分数表示。 1 1 1 1 2 1 4 1 7 3 + = - = - = - = - = 2 3 2 4 5 5 7 7 8 8 1 2 5 2 1 1 3 1 2 1 + = - = + = - = + =

10 5 6 3 3 5 8 4 3 3 5 5 9 1 4 2 1 1 1 1 - = - = - = + = - =

12 12 10 10 5 5 6 3 2 8 3 3 1 1 4 3 7 5 5 + = - = + = 1 - = + = 8 8 2 5 7 7 8 6 6 5 3 1 9 3 5 5 3 5

1- = + = - = - = + = 12 5 2 10 10 7 7 8 8 1 7 1 3 3 1 9 1 9 3 + = + = + = - = - = 6 12 4 4 7 2 10 2 10 5

5 8 1 7 19 13 19 3 + = + = - = + =

9 9 8 8 24 24 36 36

3 4 11 1 1 1 12 3 + = - = - = - =

7 7 8 8 4 9 13 13

8 4 1 1 1 3 1 1 7 3 3 + + = 1 - - = + + = - + =

9 11 9 6 6 4 4 4 8 8 8 + = - = + = - = + = - =

二、计算(能简算的要简算) 。 5 3 1 1 5 3 1 1 (1) - + (2 )1- + (3 ) +2 -1 8 10 4 24 48 4 5 2 3 2 1 5 4 2 2 3 3 2

4 )5 -2 +3 (5 ) - + - (6) -﹙ - ﹚ 5 3 6 7 15 7 15 4 4 3 1 7 3 3 4 1 1 (7 )2 - - (8)4.75 +5 -3 (9 ) - + 8 8 8 4 5 4 3

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