精品文档---下载后可任意编辑怎样简便就怎样计算:15 ÷(1-13 ×12 ) 910 ×【78 ÷(45 +14 )】 (14 -14 ×12 )÷1456 +98 ×59 ×89 9×56 +56 ÷19 (38 +127 )×8+1927X-13 X=23 1-13 X=23 8X+13 =791544 :X=51184×(34 -13 ) 38 +(37 +114 )×231112 ÷18 +1312 ×8 (34 -34 ×56 )÷43 4-(15 +13 )×3425 ÷(25 +25 ×34 )(14 -14 ×99)÷252447 ×89 +37 ×89 (16×38 +4)÷27134 ×23 ÷34 ×2379 ×(1÷78 +87 ÷1) 45 ×【(12 -15 )÷815 】3450 ×47 -47 ×95034 ×5678 +4418 ×34 -34 (34 +223 )×8+72312 ×3+5×12 3×(215 +112 )-2513 +3-(14 +112 )34 ×57 ×43 -121516 +(716 -14 )÷1223 +(47 +12 )×72514 +2X=12 5X-56 =51223 X-15 X=1 X+79 X=43一、准确计算:12 +16 ×3515 -15 ×(13 ÷12 ) (910 -78 )×45 ÷1414 ÷【14 ×(12 +14 )】 34 -34 +56 ÷4315 ÷【(13 -34 )×25 】25 +25 -3456 ×98 +59 ÷89 (56 -56 )×88 13—48×(19 +38 )127 ÷3+1927 ×1414 +2524 ×47 +8937 ×89 +38 ×27 +34(23 -34 )×(23 +79 ) 78 ÷7+87 ×45 【1-(12 +15 )】÷81534 ÷13 +18 ×34 (78 +34 -34 )×12 2-34 ÷223 -723 99×3837 ÷114 +23 ×111218 ×1312 +3450 ÷4747 ×950 ÷12 -12 45×215(112 -25 )÷1314 ÷(112 -34 ) 57 ×4-(43 +12 ) 5-1516 -0,12530×(12 +16 ) (35 +)×8+15 (13 -12 )÷910 +78(45 +14 +14 )×24 14 ×12 +14 ÷6 34 -(34 +56 )43 +15 ×1334 -25 ×(25 ÷25 ) (34 -56 )×98 ÷5989 ÷[56 ×(56 +19 )] 38 -127 +1927 ÷1414 ÷[(2524 -47 )×89 ]37 +89 -3827 ×34 +23 ÷34 (23 -79 )×88 13 ÷3+23 ×1323 +13 ×79 +23 13—48×(15 +1544 ) 511 ×14 +12 ×56 +512 45×79 99×43(34 -34 )×(38 +18 ) 18 ÷7+18 ×613 【1-(56 +53 )】÷4558 ÷+14 × (12 +16 -35 )×12 2-15 ...