ldcf.net
当前位置:首页 >> 36×25=36□÷4 >>

36×25=36□÷4

36×25 =9×(4×25) =9×100 =900

解: 36.25÷4.25x9.99 =36.25÷17/4x9.99 =36.25x4/17x9.99 =(36x4+0.25x4)x(10-0.01)÷17 =(144+1)x(10-0.01)÷17 =145x(10-0.01)÷17 =(145x10-145x0.01)÷17 =(1450-1.45)÷17 =1448.55÷17 =1700分之144855 =340分之28971 ≈85.208823...

36x(4x25÷8) =36x(100÷8) =36x12.5 =450 简便算法: 36x(4x25÷8) =36x4x25x1/8 =36x25x1/2 =18x25 =450

X = 6, 8, 10 (△无限制) X = 8, 10 (△>=0) ----------------------------------------------------------- 推导: 7△+x = x△+4 = □ (x-7)△=x-4 △ = (x-4)/(x-7) = y/(y-3)..............(y=x-4) y/(y-3) 是整数,因此 y 能被 (y-3) 整除, y...

36.72÷4.25x9.9 =8.16x9.9 =8.16×(10-0.1) =8.16×10-8.16×0.1 =81.6-0.816 =80.784

(1)25×0.36×4,=25×4×0.36,=100×0.36,=36;(2)36÷[( 5 6 - 1 3 )×4],=36÷[ 1 2 ×4],=36÷2,=18;(3) 1 8 + 5 9 + 7 8 + 4 9 ,=( 1 8 + 7 8 )+( 5 9 + 4 9 ),=1+1,=2;(4)18× 2 3 -3÷ 3 2 ,=12-3× 2 3 ,=12-2,=10.

(1)10.2×43,=(10+0.2)×43,=10×43+0.2×43,=430+8.6=438.6;(2)3.64÷4+4.36×25%,=3.64× 1 4 +4.36× 1 4 ,=(3.64+4.36)× 1 4 ,=8× 1 4 ,=2;(3)[ 5 6 -( 2 5 + 1 3 )]× 5 7 ,=[ 5 6 - 11 15 ]× 5 7 ,= 1 10 × 5 7 ,= 1 14 .

36*15=6*6*5*3=(6*5)*6*3=30*18=540

(1)57+19-20,=76-20,=56;(2)36÷4×9,=9×9,=81;(3)0×27=0;(4)160÷4+10,=40+10,=50;(5)(25-5)÷4,=20÷4,=5;(6)0÷11+11,=0+11,=11;(7)115-15÷5,=115-3,=112;(8)30×(84÷4),=30×21,=630;(9)36-0÷36,=36-...

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