ldcf.net
当前位置:首页 >> 脱式计算(能用简便计算的要用简便计算). ... >>

脱式计算(能用简便计算的要用简便计算). ...

3.6×2.5 =4×0.9×2.5 =(4×2.5)×0.9 =10×0.9 =9

我会,但现在的人太坏了,答了又不采纳

(1)13.6×3-40.6÷2,=40.8-20.3,=20.5;(2) 99×0.75+ 1 4 ×99 ,=99×(0.75+0.25),=99×1,=99;(3) ( 5 6 - 5 8 )×24 ,= 5 6 ×24- 5 8 ×24,=20-15,=5;(4) 121×100 1 121 ,=121×(100+ 1 121 ),=121×100+121× 1 121 ,=12100+1...

①12× 3 8 ÷ 3 4 =12× 3 8 × 4 3 =6;② 4 9 + 5 9 ×9= 4 9 +5=5 4 9 ;③14÷( 1 3 + 5 6 )× 3 4 =14÷ 7 6 × 3 4 =14× 6 7 × 3 4 =9;④3.6-2.8+16.4-7.2=(3.6+16.4)-(2.8+7.2)=20-10=10;⑤77× 4 5 +23×0.8=(77+23)×0.8=100×0.8=80.

(1)62×7.1+2.9,=440.2+2.9,=443.1;(2)4.2×0.25,=(4+0.2)×0.25,=4×0.25+0.2×0.25,=1+0.05,=1.05;(3)5.2×4.3+0.8×4.3,=(5.2+0.8)×4.3,=6×4.3,=25.8.

(1)(20-6.9÷0.46)×4.5,=(20-15)×4.5,=5×4.5,=22.5;(2)23×( 5 23 + 2 27 )×27,=23×27× 5 23 +23×27× 2 27 ,=135+46,=181.

原式 =(1+50)x50÷2 =51x50÷2 =51x25 =1275 或者 =(1+50)+(2+49)+……+(25+26) =51+51+……+51 =51x25 =1275

①52.32-(6+3.06)×1.5=52.32-9.06×1.5=52.32-13.59 =38.73 ②72.6×0.3+0.3×27.4=0.3×(72.6+27.4)=0.3×100=30③[3.8-(1.26+0.34)]×0.45=(3.8-1.6)×0.45=2.2×0.45=0.99 ④11.79+7.65×2.4+10.64=11.79+18.36+10.64=11.79+29=40.79

①11.23-3.4+8.77-6.6=11.23+8.77-(3.4+6.6)=20-10=10;②5.4÷[0.68÷(1.2-1.03)]=5.4÷[0.68÷0.17]=5.4÷4=1.35;③(3.24×99+3.24)÷8.1 =[3.24×(99+1)]÷8.1=324÷8.1=40;④(18.4-3.75)÷12.5÷0.8=14.65÷12.5÷0.8=14.65÷(12.5×0.8)=14.65÷10...

(1)15×43%+85×0.43=15×0.43+85×0.43,=(15+85)×0.43,=100×0.43,=43;(2) 7 9 ÷ 11 5 + 2 9 × 5 11 = 7 9 × 5 11 + 2 9 × 5 11 ,=( 7 9 + 2 9 )× 5 11 ,=1× 5 11 ,= 5 11 ;(3)( 1 2 - 1 3 )× 3 8 ÷25%=( 3 6 - 2 6 )× 3 8 ÷...

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