5*2*3*4+1*3=
1*3*2+1*4*5=
chu y * la nhan
Những câu hỏi liên quan
2,5 * 9,6*4 =
1+1*2=
2+2*3=
2+1*1=
5+3*1=
chu y * la nhan
2,5 x 9,6x4 = 96
1+1x2=3
2+2x3=8
2+1x1=3
5+3x1=8
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1.tim so bi chia trong phep chia cho 12 co thuong la 35 va so du la so le co 2chu so2.hieu cua so lon nhat co 4 chu so khac nhau va so nho nhat co 4 chu sola bao nhieu3.mot hinh chu nhat co chieu dai gap ruoi chieu rong. Neu moi chieu tang them 1m thi duoc hinh chu nhat moi co dien tich tang them 26m2. Tinh chu vi hinh chu nhat4.trung binh cong cua 2 phan so bang 5/12. Phan so thu nhat hon phan so thu hai 1/6. Tim phan so thu nhat5.tim y biet (5/7 - y) nhan 4/5 7/10 + 1/26.hieu 2 so 1/3 so be.To...
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1.tim so bi chia trong phep chia cho 12 co thuong la 35 va so du la so le co 2chu so
2.hieu cua so lon nhat co 4 chu so khac nhau va so nho nhat co 4 chu sola bao nhieu
3.mot hinh chu nhat co chieu dai gap ruoi chieu rong. Neu moi chieu tang them 1m thi duoc hinh chu nhat moi co dien tich tang them 26m2. Tinh chu vi hinh chu nhat
4.trung binh cong cua 2 phan so bang 5/12. Phan so thu nhat hon phan so thu hai 1/6. Tim phan so thu nhat
5.tim y biet (5/7 - y) nhan 4/5 =7/10 + 1/2
6.hieu 2 so =1/3 so be.Tong 2 so la 63. Tim so be
bai 1:tim x(chu y dau * la dau nhan)
a)(x+1/4)+(3x-4)+2*(x-3)=1
b)2*(x-3)=3(x+2)-x+1
c)x*(x+3)+x(x-2)=2x*(x-1)
d)(x-1)*3x-2*(x+2)-2x=x(x-1)
a: \(\left(x+\dfrac{1}{4}\right)+\left(3x-4\right)+2\left(x-3\right)=1\)
=>\(x+\dfrac{1}{4}+3x-4+2x-6=1\)
=>\(6x-\dfrac{39}{4}=1\)
=>\(6x=1+\dfrac{39}{4}=\dfrac{43}{4}\)
=>\(x=\dfrac{43}{4}:6=\dfrac{43}{24}\)
b: \(2\left(x-3\right)=3\left(x+2\right)-x+1\)
=>\(2x-6=3x+6-x+1\)
=>2x-6=2x+7
=>-6=7(vô lý)
c: \(x\left(x+3\right)+x\left(x-2\right)=2x\left(x-1\right)\)
=>\(x^2+3x+x^2-2x=2x^2-2x\)
=>3x-2x=-2x
=>3x=0
=>x=0
d: \(\left(x-1\right)\cdot3x-2\left(x+2\right)-2x=x\left(x-1\right)\)
=>\(3x^2-3x-2x-4-2x=x^2-x\)
=>\(3x^2-7x-4-x^2+x=0\)
=>\(2x^2-6x-4=0\)
=>\(x^2-3x-2=0\)
=>\(x=\dfrac{3\pm\sqrt{17}}{2}\)
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1/7=8/-x
3x/9=2/6
4/2/5:(-33/10)+x=-1/5/6
(x-2/1/4):(-5/6)=3
-8:(4/1/5x+3/10)=4/4/9
(5,5x-44):(-3/2)=30
(13/10x-15).(-5/14)=3
1/3.(x+5/2)=-2
chu y dau( //)la so tap phan con dau( /) la phan so
\(\frac{4}{\frac{2}{5}}:\left(-\frac{33}{10}\right)+x=-\frac{1}{\frac{5}{6}}\)
\(10:\left(-\frac{33}{10}\right)+x=-\frac{6}{5}\)
\(-\frac{100}{33}+x=-\frac{6}{5}\)
\(x=\frac{302}{165}\)
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Cau 1: Mot truong tieu hoc co 567 hoc sinh,so hoc sinh nam bang 2/3 so hoc sinh nu.Hoi truong do co bao nhieu hoc sinh nam,bao nhieu hoc sinh nu?Cau 2: Mot thua ruong hinh chu nhat co chu vi la 350m,chieu rong bang 3/4 chieu dai.Tinh dien tich thua ruong hinh chu nhat do.Cau 3: Ting gia tri cua bieu thuc: a) (5/3 - 4/5) nhan 3/2 b) 3/2 + 3/4 : 2/3Cau 4: Tinh bang cach thuan tien nhat. a) 1/5 + 4/11 + 4/5 + 7/11 ...
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Cau 1: Mot truong tieu hoc co 567 hoc sinh,so hoc sinh nam bang 2/3 so hoc sinh nu.Hoi truong do co bao nhieu hoc sinh nam,bao nhieu hoc sinh nu?
Cau 2: Mot thua ruong hinh chu nhat co chu vi la 350m,chieu rong bang 3/4 chieu dai.Tinh dien tich thua ruong hinh chu nhat do.
Cau 3: Ting gia tri cua bieu thuc:
a) (5/3 - 4/5) nhan 3/2 b) 3/2 + 3/4 : 2/3
Cau 4: Tinh bang cach thuan tien nhat.
a) 1/5 + 4/11 + 4/5 + 7/11 b) 27 nhan 45 - 23 nhan 27 - 27 nhan 11
đầu bài sai rồi
cau 1: giai
tong so phan bang nhau la:
2+3=5[phan]
truong do co so hoc sinh nam la:
567:5x2=226.8[hoc sinh]
so hoc sinh nu co trong truong la:
567-226.8=340.2[hoc sinh]
Dap so:226.8 hoc sinh nam
340.2 hoc sinh nu
cau 2: giai
nua chu vi hinh chu nhat do la:
350:2=175[m]
tong so phan bang nhau la:
3+4=7[phan]
chieu rong hinh thua ruong chu nhat do la:
175:7x3=75[m]
chieu dai hinh thua ruong chu nhat do la:
175-75=100[m]
dien h thua ruong do la:
100x75=7500[m2]
Dap so:7500m2
cau 3:tinh gia tri cua bieu thuc
a,[5/3-4/5]x3/2=[25/15-12/15]x3/2=13/15x3/2=39/30=13/10
b,3/2+3/4:2/3=3/2+9/6=3/2+3/2=6/2=3
cau 4:tinh bang cach thuan tien nhat:
a,1/5+4/11+4/5+7/11=[4/11+7/11]+[4/5+1/5]=1+1=2
b,27x45-23x27-27x11=27x[45-23-11]=27x11=297
o cau1,2 ban can them so do vao
o cau1 ban them ngay sau giai
o cau2 ban them so do sau khi tinh nua chu vi
o cau 1 tong so hoc sinh ko dung
x +x x 3/4 = 1
chu y chu x thu 3 la dau nhan
35 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
3/5 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
ban ko tra loi ho minh cau nay a
neu the minh ket ban kieu gi
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2/5: 3/7 nhan 3/7 : 2/5 + 1999
{1- 1/2} nhan { 1 - 1/3} nhan { 1 - 1/4 } nhan { 1 - 1/5}
\(\frac{2}{5}:\frac{3}{7}x\frac{3}{7}:\frac{2}{5}+1999=\)\(\frac{2}{5}x\frac{7}{3}x\frac{3}{7}x\frac{5}{2}+1999=\)\(\left(\frac{2x7x3x5}{5x3x7x2}\right)+1999=\)\(1+1999=2000\)
\(\left(1-\frac{1}{2}\right)x\left(1-\frac{1}{3}\right)x\left(1-\frac{1}{4}\right)x\left(1-\frac{1}{5}\right)\)\(=\left(\frac{2}{2}-\frac{1}{2}\right)\)\(x\left(\frac{3}{3}-\frac{1}{3}\right)\)\(x\left(\frac{4}{4}-\frac{1}{4}\right)\)\(x\left(\frac{5}{5}-\frac{1}{5}\right)\)\(=\frac{1}{2}x\frac{2}{3}x\frac{3}{4}x\frac{4}{5}=\)\(\frac{1x2x3x4}{2x3x4x5}=\frac{1x\left(2x3x4\right)}{\left(2x3x4\right)x5}=\frac{1}{5}\)\(.\)
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2/5:3/7 nhân 3/7:2/5+1999
=2/5 nhân 7/3 nhân 3/7nhân 5/2+1999
=14/15 nhân 15/14+1999
=1+1999
=2000
(1-1/2) nhân (1-1/3) nhân (1-1/4) nhân (1-1/5)
=1/2 nhân 2/3 nhân 3/4 nhân 4/5
=24/120
=1/5
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tinh nhanh
(217+417).(314-312).(24-42)
152+53
luu y:.la nhan
(217 + 417) x (314-312) x (24-42) = (217+417) x (314-312) x 0 = 0
152+53 = 1+125 = 126
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=126 nha ban
chuc ban hoc gioi nha ban
co gang nha ban
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