分数乘除法简便运算 100 题(有答案) (1 )(89 + 42 7 )×3 ×9 (2)(38 - 38 )× 61 5 (3 ) 16 ×(7 - 23 ) (4) 56 ×59 + 59 × 16 (5 )29 ×34 + 52 7 × 34 (6 ) 61 3 ×75 - 61 3 × 25 (7 ) 71 2 ×6 - 51 2 × 6 (8 )38 +38 ×47 +38 ×37 (9 ) 3 7 × 33 5 (1 0 ) 62 5 × 24 (11)1521 ×34 + 1021 ×34 - 34 (12)710 ×101- 710 (13) 89 ×89 —89 ×89 (14) 35 × 99 + 35 (15)( 47 + 89 )×7 ×9 (16)345 ×25 (17) 36×3435 (18) ( 56 - 59 )×185 (1 9 )2 6 23 × 15 (20)3225 ×56 (2 1 ) 5121101 (22 ) 57535 (23)87748773 (24 )91929197 (25 ) 652053 (26)1 25941 2595 (27)38 - 38 ×47 - 38 ×37 (28)6 23 76 3 (29) 31 ÷ 76 + 32 ÷ 76 (3 0 )229 ×(15×2931 ) (31) 58 ×23 ×815 (32)2534 ×4 (33)54×(89 - 56 ) (34)7 212 451 871 21 1 (35) 3831 1623 7 5
01 1583 (36)1 92 52 142 51 975 (37) 4 818365 (38) 2 412 41 343651 2