分数加减法简便运算专项练习 136 题(有答案) (1) + + ﹣ (2) ﹣( ﹣ ) (3) . (4) ﹣( ﹣ ) (5) + + + (6) + ﹣ + (7) ﹣( +) (8) ﹣ ﹣ (9) ﹣ + ﹣ . (10) . (11) 999 +99 +9 + . (12) + + + + ++++ (1 3 ) ﹣+ ﹣ (1 4 ) ﹣(﹣1 ) (1 5 ) 2 ﹣ ﹣ . (1 6 ) ﹣0
4 +﹣ . (1 7 ) . (1 8 ) (1 9 ) (2 0 ) (2 1 ) +﹣ (2 2 ) 1 ﹣﹣ (2 3 ) ++ + (2 4 ) (25) (26) + ﹣ (27) ﹣(﹣ ) (28) + + (29) 3﹣ (30) (31) 4﹣﹣ (32) . (33) +(+ ) (34) ﹣(+) (35) + + + . (36) ++ + (3 7 ) + ﹣ (3 8 ) + ﹣ + (3 9 ) +(﹣ )+ (4 0 ) 0
5 8 ++1
1 2 + (4 1 ) 1 1 ﹣﹣. (4 2 ) (4 3 ) 3
5 ﹣﹣. (4 4 ) + + +﹣﹣. (4 5 ) ﹣ + ﹣ (4 6 ) ﹣(+) (4 7 ) + + + . (4 8 ) 6 ﹣﹣ (49) ﹣ + (50) ﹣(﹣ ) (51) + ﹣ (52) +++ (53) ﹣ +﹣ (54) + + + (55) 8﹣﹣ (56) + ﹣+ (57) ﹣(+ ) (58) 2﹣ ﹣ (59) ﹣+ (60) + + + (61) ﹣(+ ) (62) 1﹣ ﹣ ﹣ ﹣﹣ (63) 6﹣﹣ (64) ﹣ +﹣ (65) ﹣(﹣ ) (66) ﹣(+ ) (67) . (68) 1﹣()﹣. (69) ﹣(+ ) (70) + + (71) ﹣(﹣ ) (