ldcf.net
当前位置:首页 >> 脱式计算. (1)49+67+59 (2)34?(56?1... >>

脱式计算. (1)49+67+59 (2)34?(56?1...

(1)49+67+59,=49+59+67,=1+67,=167;(2)34-(56-13),=34-12,=14;(3)53?27?57,=53-(27+57),=53-1,=23.

(1)89+(1-34)×49,=89+14×49,=89+19,=1;(2)(34÷3-0.1)×(1-23),=(14-0.1)×(1-23),=0.15×13,=0.05.

(1)49×[34-(716-14)]=49×[34-316]=49×916=14;(2)6.25×0.56+58×3.4+5×18=6.25×0.56+58×3.4+5×18=0.625×5.6+0.625×3.4+0.625=0.625×(5.6+3.4+1)=0.625×10=6.25;(3)6.72-2.3÷0.5×0.8=6.72-4.6×0.8=6.72-3.68=3.04;(4)2007÷200720072...

①527×54+54×2227,=(527+2227)×54,=54;②25×47+37÷52,=25×47+37×25,=25×(47+37),=25;③[2?(1+23)]÷27,=[2?123]÷27,=13÷27,=76;④(56?34)÷748+127,=112÷748+127,=47+127,=167.

(1)67÷[(47-12)×25]=67÷[114×25]=67÷135=67×35=30;(2)1415×25%-1115÷4=1415×14-1115×14=(1415-1115)×14=15×14=120;(3)1.28×2.37-2.8×0.237=1.28×2.37-0.28×2.37=(1.28-0.28)×2.37=1×2.37=2.37;(4)(512+119)×12+719=512×12+11...

(1)2091-2091÷17,=2091-123,=1968;(2)(34-34×25)÷15,=34×(1-25)×5,=34×35×5,=94;(3)1.28×2.37-2.8×0.237=1.28×2.37-0.28×2.37,=(1.28-0.28)×2.37,=1×2.37,=2.37;(4)(512+119)×12+719,=512×12+119×12+719,=5+(1219...

(1)4×7.5-5.23-3.77,=30-(5.23+3.77),=30-9,=21;(2)(2-56×35)÷34,=(2-12)÷34,=32×43,=2;(3)911×67+911÷7,=911×67+911×17,=911×(67+17),=911×1,=911;(4)310÷[34÷(0.5-14)],=310÷[34÷(12-14)],=310÷[34÷14],=...

(1)580+522÷29×15=580+18×15=580+270=850;(2)14.87-3.34-5.66=14.87-(3.34+5.66)=14.87-9=5.87; (3)34+14÷(1-45)=34+14÷15=34+54=2;(4)1.25×3.2×2.5=1.25×(8×0.4)×2.5=(1.25×8)×(0.4×2.5)=10×1=10;(5)42×(13+57-214)=...

(1)72.8÷5.6+1.49,=13+1.49,=14.49;(2)58.1-29.7÷3,=58.1-9.9,=48.2;(3)30.94-5.09-4.91,=30.94-(5.09+4.91),=30.94-10,=20.94;(4)3.94+34.3×0.2,=3.94+6.86,=10.8;(5)5.4×2.3+5.4×7.7,=5.4×(2.3+7.7),=5.4×10,=5...

(1)(66-32×1.2)÷0.25,=(66-38.4)÷0.25,=27.6÷0.25,=110.4,(2)10×34+17×75%-7×0.75,=10×0.75+17×0.75-7×0.75,=(10+17-7)×0.75,=20×0.75,=15,(3)0.25×[515×(3-2.5×78)],=0.25×[515×(3-3516)],=0.25×[515×1316],=14×26...

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com