分数简便运算(1) (1 )1 4741 35 (2 ) 56153 (3 )2 66831 41 3 (4 )2 7)2 7498( (5 )2 0)4152( (6 ) 1 819776 (7 )21311 5121 (8 )61959565 (9 )751754 (1 0 )759575 (11 )92921 67 (1 2)2 32 33 11 72 33 11 4 (1 3 )2 0 1 62 0 1 52 0 1 7 (1 4 )2 0 1 72 0 1 61 9 9 8 (1 5 )1 3 53 41 3 6 (16)513226 (17)815341 (18)135127 (19)247179249175 (20)1981361961311 (21)1381137138137139 (22)1091541431321 (23)19171751531311 (24)721561421301201121 (25)7217-56154213-3011209-127 《巩固练习》 (26) 52 × 214 ×10 (27) 125 × 41 ×24 (28) 69765 (29) 47 ×1522 × 712 (30)59 × 34 +59 × 14 (31) 43 × 52 + 43 ×0
6 (32) 6
8× 51 + 51 ×3
2 (33)( 34 +58 )×32 (34) ( 32 + 43 - 21 )×12 (35)( 94 - 32 )× 83 (36)1113 -1113 ×1333 (37) 257 ×101- 257 (38) 15 + 29 × 310 (39)46× 4544 (4