9/22 x 33/18
a) 9/22 x 33/18 =
b) 12/35 : 36/25 =
c) 19/17 : 76/51 =
a) 9/22 x 33/18 =3/4
b) 12/35 : 36/25 = 5/21
c) 19/17 : 76/51 =3/4
a) \(\frac{9}{22}\times\frac{33}{18}\)
\(=\frac{9}{22}\times\frac{11}{6}\)
\(=\frac{9\times11}{22\times6}=\frac{3}{4}\)
b) \(\frac{12}{35}:\frac{36}{25}=\frac{12}{35}\times\frac{25}{36}\)
\(=\frac{5}{21}\)
c) \(\frac{19}{17}:\frac{76}{51}=\frac{19}{17}\times\frac{51}{76}\)
\(=\frac{3}{4}\)
\(a,\frac{9}{22}x\frac{33}{18}\)
\(=\frac{3.3.11.3}{11.2.3.3.2}\)
\(=\frac{3}{2.2}\)
\(=\frac{3}{4}\)
\(b,\frac{12}{35}:\frac{36}{25}\)
\(=\frac{12}{35}.\frac{25}{36}\)
\(=\frac{12.25}{35.36}\)
\(=\frac{12.5.5}{5.7.12.3}\)
\(=\frac{5}{7.3}\)
\(=\frac{5}{21}\)
\(c,\frac{19}{17}:\frac{76}{51}\)
\(=\frac{19}{17}.\frac{51}{76}\)
\(=\frac{19.51}{17.76}\)
\(=\frac{19.17.3}{17.19.4}\)
\(=\frac{3}{4}\)
a ) 9 x 15 x 22
30 x 9 x 44
b) 33 x 38 + 15
33 x 39 - 18
tách mỗi thừa số ra
a,\(\frac{3\cdot3\cdot5\cdot3\cdot11\cdot2}{3\cdot10\cdot3\cdot3\cdot11\cdot4}=\frac{1}{10}\)
câu trả lời cho câu hỏi của Huong Le Thị Lan: 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32.
=(1+32)+(2+31)+(3+30)+(4+29)+(5+28)+(6+27)+(7+26)+(8+25)+(9+24)+(10+23)+(11+22)+(12+21)+(13+20)+(14+19)+(15+18)+(16+17)
=33+33+33+33+33+33+33+33+33+33+33+33+33+33+33+33. =33.16 (dấu chấm là dấu nhân)=528
wow! mù mắt. Ido tính toán có khác!
C2:(32+1)x32:2=528
bạn tính thử xem đúng đấy.
a ) 9/22 x 33/18 =
b ) 12/35: 36/25 =
c ) 19/17 : 76/51 =
ai dung nhanh thì ...biết rồi đấy
mẩu 9/10 x 5/6 =3x3x5/5x2x3x2 =3/4
1/7 +1/8+1/9+....+1/15+1/18+1/22+1/24+1/28+1/33
Giúp làm bài này: 2/9-5/7+20/33+8/21+5/18-6/22
= \(\left(\frac{2}{9}+\frac{5}{18}\right)+\left(\frac{8}{21}-\frac{5}{7}\right)+\left(\frac{20}{33}-\frac{6}{22}\right)\)
= 1/2 -1/3 +1/3
= 1/2
Tìm X
A) X : 9/22 = 44
B) X : 5/11 = 33
C) X : 4/33 = 22
a)\(x:\frac{9}{22}=44\) b)\(x:\frac{5}{11}=33\) c)\(x:\frac{4}{33}=22\)
\(x\) \(=44\times\frac{9}{22}\) \(x\) \(=33\times\frac{5}{11}\) \(x\) \(=22\times\frac{4}{33}\)
\(x\) \(=18\) \(x\) \(=15\) \(x\) \(=\frac{8}{3}\)
A) X : 9/22 = 44
X=44x9/22
X=18
B) X : 5/11 = 33
X=33x5/11
X=15
C) X : 4/33 = 22
X=22x4/33
X=8/3
\(x:\frac{9}{22}=44\)
\(x=44X\frac{9}{22}\)
\(x=18\)
vậy X = 18
\(x:\frac{5}{11}=33\)
\(x=33X\frac{5}{11}\)
\(x=15\)
vậy X = 15
\(x:\frac{4}{33}=22\)
\(x=22X\frac{4}{33}\)
\(x=\frac{8}{3}\)
vậy X = \(\frac{8}{3}\)
22/5 x 25/18 =...........
9/11:2 5/2 x2 3/4=...........
10:35/24:36/7=............
10,77x9,8+5,23x9,8=.........
1,26x3,6:0,28-6,2 =................
Tính bằng cách thuật tiện nhất :
20/11 x 33/23 x 69/180=.................
\(\frac{22}{5}x\frac{25}{18}=\frac{550}{90}=\frac{55}{9}\)
\(\frac{9}{11}:2\frac{5}{2}x2\frac{3}{4}=\frac{9}{11}:\frac{9}{2}x\frac{11}{4}=\frac{9}{11}x\frac{2}{9}x\frac{11}{4}=\frac{1}{2}\)
\(10:\frac{35}{24}:\frac{36}{7}=10x\frac{24}{35}x\frac{7}{26}=\frac{10}{1}x\frac{24}{35}x\frac{7}{26}=\frac{24}{13}\)
10,77 x 9,8 + 5,23 x 9,8
= (10,77 + 5,23) x 9,8 = 16 x 9,8 = 156,8
1,26 x 3,6 : 0,28 - 6,2 = 4,536 : 0,28 - 6,2=
16,2 - 6,2 = 10
20/11 x 33/23 x 69/180 =
1/1 x 3/1 x 3/9 =
3/1 x 1/3 = 1
(Câu cuối trong fx không có phần gạch giữa {S} nên mình ghi tạm ngoài này nha bạn!)
Giải các pt sau:
A, x+3/2 - x-1/3 = x+5/6 + 1
B, x+1/35 + x+3/33 = x+5/31 + x+7/29
C, x-10/18 + x-8/20 + x-6/22 = x-19/9 + x-21/7 + x-15/13
A, \(\frac{x+3}{2}\)-\(\frac{x-1}{3}\)=\(\frac{x+5}{6}\)+1
⇔ \(\frac{3\left(x+3\right)}{6}\)-\(\frac{2\left(x-1\right)}{6}\)=\(\frac{x+5}{6}\)+\(\frac{6}{6}\)
⇔ 3x+9-2x+2=x+5+6
⇔ 3x-2x-x=5+6-9-2
⇔0x=0 (luôn đúng với mọi x)
Vậy phương trình có vô số nghiêm:S=R
a) \(x+\frac{3}{2}-x-\frac{1}{3}=x+\frac{5}{6}+1\)
⇔ \(\frac{3}{2}-x-\frac{1}{3}=\frac{5}{6}+1\)
⇔ \(\frac{7}{6}-x=\frac{5}{6}+1\)
⇔ \(\frac{7}{6}-x=\frac{11}{6}\)
⇔ \(-x=\frac{11}{6}-\frac{7}{6}\)
⇔ \(-x=\frac{2}{3}\)
⇔ \(x=\frac{-2}{3}\)
Vậy tập nghiệm của pt là S = \(\left\{\frac{-2}{3}\right\}\)