脱式计算(能简算的要简算)
第一个是:原式=3+27分之5*10分之27=3+18分之7=3又18分之7, 第二个是:原式=17分之4*17+25分之1*25=4+1=5
能简算的要简算(脱式计算)
脱式计算,能简算的要简算: 127 -(57 +12 ) =127-57-12 =70-12 =58 [1-(14 +38 )]÷1\/4 = 4-52*4 = (60-1)*6+49\/16 =360-6+3又16分之1 =354+3又16分之1 =357又16分之1 180÷2.5÷4 =180÷(2.5*4) =180÷10 =18 白做了半天! 12...
脱式计算(能简算要简算)108x98
脱式计算如下:108×98 =108×(100-2)=108×100-108×2 =10800-216 =10584 【
我会脱式计算.(能简算的要简算)
解题思路:(1)运用乘法结合律简算;(2)先算乘法,再算减法;(3)把101看作100+1,运用乘法分配律简算.(1)2.12×0.8×5 =2.12×(0.8×5)=2.12×4 =8.48 (2)54.5-7.2×3.5 =54.5-25.2 =29.3 (3)0.65×101 =0.65×(100+1)=0.65×100+0.65 =65+0....
脱式计算,能简算的要简算.2.139÷9.3×6.2
(2)(4)运用乘法分配律简算.(1)2.139÷9.3×6.2 =0.23×6.2 =1.426 (2)2.06+2.06×99 =2.06×(99+1)=2.06×100 =206 (3)0.72×0.8÷0.32 =0.576÷0.32 =1.8 (4)3.8×1.96-3.8×0.96 =3.8×(1.96-0.96)=3.8×1 =3.8 点评:本题...
能简算的要简算(脱式计算)
=(50+3)×(50-3)-8 =2500-9-8 =2491-8 =2483 29×27-27×9 =27×(29-9)=27×20 =540 25×27×40 =25×40×27 =1000×27 =27000 (132+18)÷(40-15)=150÷25 =6 522÷【(301-299)×29】=522÷【2×29】=522÷58 =9 202+135+198 =(202+198)+135 =...
2.脱式计算,能简算的要简算 (9分)l=2.8-3\/(10)+7\/(10)= 15+512+17?
(1)2.8-3\/10+7\/10 =2.8-0.3+0.7 = 2.5+0.7 =3.2。(2)15+512+17 =527+17 =544。
脱式计算,能简算的要简算
=3.8+3.91÷2.3 =3.8+1.7 =4.5 2. 68÷[0.5x(7.5-0.7)]=68÷[0.5x6.8]=68÷3.4 =20 3. 352-162÷36x24 =352-4.5 x24 =352+108 =460 4. [六分之五-(十四分之五-七分之二)]x十八分之七 =[六分之五-十四分之一]x十八分之七 16 7 = — ×...
完成脱式计算,能简算的要简算?
=1\/13 + 2\/7=7\/91 + 26\/91=33\/91 原式=4\/5 - (2\/4 + 1\/4)=4\/5 - 3\/4 =16\/20 - 15\/20=1\/20 2、解:x=3\/5 - 2\/7 x=21\/35 - 10\/35 ∴x=11\/35 解:2x=5\/8 + 3\/8 2x=1 ∴x=1\/2 解:x=5\/6 + 1\/3 + 1\/2 x=5\/6 + 2\/6 + 3\/6 ∴x=5\/3...