38x125x8x3的简便计算
38x125x8x3有什么简便算法 -
38x125x8x3 =38x3x(125x8)114x1000 =114000
38×125×8×3 =38×(125×8)×3 =38×1000×3 =38000×3 =114000 利用乘法结合律,简便运算要牢记特殊的数字组合,比如最常见的125×8=1000 25×4=100 等等!望采纳,谢谢!
38x125x8x3 =38x3x(125x8)114x1000 =114000
38×125×8×3 =38×(125×8)×3 =38×1000×3 =38000×3 =114000 利用乘法结合律,简便运算要牢记特殊的数字组合,比如最常见的125×8=1000 25×4=100 等等!望采纳,谢谢!
先让125和8相乘,等于1000,然后38乘3等于114,最后114乘1000等于114000
38x125x3x8 =(38×3)x(125x8)114x1000 =114000
数学。用简便方法计算,谢谢件你! -
125x24=125x8x3=1000x3=3000 7800/4/25=7800/(4x25)=7800/100=78 30-14.2-5.8=30-(14.2+5.8)=30-20=10 (125+50)x8=125x8+50x8=1000+400=1400 38x101-38=38x(101-1)=38x100=3800
38x25x4 =38x(25x4)=38x100 =3800
简便计算。 -
7+7.1—6.3 =(12.9+7.1)-(3.7+6.3)=20-10 =10 38x67+38x34—38 =38x(67+34-1)=38x100 =3800)10.15—12.64—8.85)=10.15+8.85-12.64 =19-12.64 =6.36 160x25 =(4x25)x40 =100x40 =4000 25x16x125 =25x2x8x125 =(25x2)x(8x125)=50x1000 =50000 后面会介绍。
81x3-9xx2-y2-5x-5y x2-y2+2yz-z2 因式分解:xy2-2xy-3x-y2-2y-1 因式分解y2(x-y)+z2(y-x) 设x+1是2x2+ax-3的因式,(1)求a=? (2)求2x2+ax-3=0之二根因式分解x2+x+y2-y-2xy=? 若x-y=99求x2+x+y2-y-2xy之值? (一)计算题: (1)(-4)(+6)(-7) (2)(-27)(说完了。
急需数学计算题,初一下册 -
38x/18=18/10 x=10/18÷38/18 x=10/18×18/38 x=5/19 (5x2-2x+3)+(3x2+5x+2)x2y +2xy2 –y3 +3xy2 –4x2y-x3 3ab-4ab+8ab-7ab+ab=___.7x-(5x-5y)-y=___.23a3bc2-15ab2c+8abc-24a3bc2-8abc=___.-7x2+6x+13x2-4x-5x2=___.2y+(-2y+5)-(3y+2等会说。
x2 –y2 -1 ( x + y) (x – y )x2 + 1 x2 -2-(x -1x )2 a3-a2-2a 4m2-9n2-4m+1 3a2+bc-3ac-ab 9-x2+2xy-y2 2x2-3x-1 -2x2+5xy+2y2 10a(x-y)2-5b(y-x)an+1-4an+4an-1 x3(2x-y)-2x+y x(6x-1)-1 2ax-10ay+5by+是什么。