1 乘法简便运算专项练习 班别: 姓名: 分数: (712 - 15 )×60 (1 83 + 89 )×18 ( 56 - 59 )×185 (22 0 + 15 )× 5 (89 + 42 7 )×27 6 ×(21 8 + 73 0 ) (2 41 5 - 38 )× 61 5 16 ×(96 +23 ) (35 +2 52 )× 2 5 (92 4 + 83 )× 12 4 (2 07 - 15 )×20 ( 56 - 59 )×18 2 1 2 ×( 72 4 + 56 + 34 ) 41 7 ×(34 + 21 7 ) (15 + 37 )×3 5 47 × 613 +37 × 613 56 ×59 + 59 × 16 34 ×53 + 34 × 25 2 72 2 ×34 + 52 7 × 34 61 3 ×75 - 61 3 × 25 71 2 ×6 + 51 2 × 6 47 × 613 + 37 × 613 833×1 17 +1 14 ×833 0 .9 2 ×1 .4 1 +0 .9 2 ×8 .5 9 3 51 6 ×1 37 -53 ×1 37 1 .3 ×1 1 .6 -1 .6 ×1 .3 59 ×1 1 .6 +1 8 .4 ×59 57× 38+ 58× 57 23×7+ 23×5 21×73 +74 ×21 1 0 06 3 ×101 67 7 × 78 52 7 ×2 8 36×3435 2 1 × 32 0 3 7 × 33 5 62 5 × 24 34×3435 61 3 ×1 2 52 7 ×2 6 2931 × 30 2728 × 27 4 445 ×10 2538 ×8 345 ×2.5 (15 + 37 )×7 ×5 ( 712 - 15 )×5 × 12 ( 56 - 59 )×6×18 ( 47 + 89 )×7×9 ( 22 0 + 15 )× 5×4 (89 + 42 7 )×27×3 ( 22 0 + 38 )× 2 0 × 8 3 ×12×(23 - 16 ) (35 +4 )× 2 5 5 (12 4 + 83 )×2 4 (712 - 15 )×6×10 ( 56 - 59 )×18×2 6 ×5×(21 8 + 73 0 ) 30×(21 8 + 73 0 ) ( 712 - 15 )×60 710 ×101- 710 35 × 99 + 35 710 ×101- 710 12× 613 + 613 85 ×7 +85 0 .9 2 ×9 9 +0 .9 2 6 1 4 ×1 37 -1 37 1 .3 ×1 1 -1 .3 59 ×1 9 +59 57×1 3 + 57 23×20+ 23 12× 613 + 613 1 7 ×59 + 59 34 ×1 9 + 34 2 3 ×34 + 34 乘法结合律和交换律 53 ×61 ×5 32 ×41 ×3 94 ×5×18 54 ×97 ×85 75 ×16×52 1 1 35 ×74 ×14 7 25 × 4 × 34 6 ×( 218 × 730 ) 417 ×(125 × 34) 89 × 427 ×27 514 × 2125 ×75 34 × 25 ×75 25 × 210 ×56 5×47 ×35 23 ×15 ×6 分数混合计算练习题 16 ×(7 - 23 ) (35 + 2521 )× 25 1- 514 × 2125 8 12 + 64 × 46 16 ×(5 - 23 ) 25 × 210 + 910 57 - 49 ×64 1-57 ×2521 21 +(45 ×54 ) 127 ×6+125 135 ×74 +83 31×53+54