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\(\dfrac{3}{4}\times\dfrac{8}{5}:1\dfrac{1}{6}\)
=\(\dfrac{6}{5}:\) \(\dfrac{7}{6}\)
=\(\dfrac{6}{5}\times\dfrac{6}{7}=\dfrac{36}{35}\)
2\(\dfrac{1}{3}\) x 1\(\dfrac{1}{4}\) -\(\dfrac{7}{5}\)
\(\dfrac{7}{3}\times\dfrac{5}{4}-\) \(\dfrac{7}{5}\)
\(\dfrac{35}{12}-\dfrac{7}{5}\)
\(\dfrac{175}{60}-\dfrac{84}{60}=\dfrac{91}{60}\)
4\(\dfrac{2}{3}+1\dfrac{1}{4} +2\dfrac{1}{3}+2\dfrac{3}{7}\)
(4 +2) + \(\left(\dfrac{2}{3}+\dfrac{1}{3}\right)\) +1\(\dfrac{1}{4}\) + \(2\dfrac{3}{7}\)
6 + 1 + \(\dfrac{5}{4}\) + \(\dfrac{17}{7}\)
7 + \(\dfrac{103}{28}\)
\(\dfrac{299}{28}\)
Tìm x:
- x . 7 + x . 12 =266
- x . 3,5 - x . 1,7 = 81,486
- x . 7 + x . 12 =266
- x . 3,5 - x . 1,7 = 81,486
- 49,8 - x : 2,4 = 29,8
- (x-12 ) . 2 + 3 = 7
- ai giúp mk thì mk k ^.^
Toán lớp 5 Tìm xTìm x:
- x . 7 + x . 12 =266
- x . 3,5 - x . 1,7 = 81,486
- 49,8 - x : 2,4 = 29,8
- (x-12 ) . 2 + 3 = 7
- ai giúp mk thì mk k ^.^
- 49,8 - x : 2,4 = 29,8
Tìm x:
- x . 7 + x . 12 =266
- x . 3,5 - x . 1,7 = 81,486
- 49,8 - x : 2,4 = 29,8
- (x-12 ) . 2 + 3 = 7
- ai giúp mk thì mk k ^.^
- (x-12 ) . 2 + 3 = 7
- ai giúp mk thì mk k ^.^
1. x.7 + x.12 = 266
x.(7+12) = 266
x.19 =266
x = 266:19
x = 14
2. x.3,5-x.1,7 = 81,486
x.(3,5-1,7) = 81,486
x.1,8 = 81,486
x = 81,486 : 1,8
x = 45,27
3. (x- \(\frac{1}{2}\) ) .2 + 3 = 7
\(\left(x-\frac{1}{2}\right).2=7-3=4\)
\(x-\frac{1}{2}=4:2=2\)
\(x=2-\frac{1}{2}\)
\(x=\frac{3}{2}\)
\(\chi\)+ 78 x \(\chi\)+ 25 x \(\chi\)- \(\chi\)x 4 = 78,6 + 121,4
\(\chi\)x (1 + 78 + 25 -4) = 200
\(\chi\)x 100 = 200
\(\chi\) = 200 \(\div\)100
\(\chi\)= 2
=^_^=
k mình nha
\(\left(2020\frac{2018}{2021}-2019\frac{20182018}{20212021}\right):\frac{2018}{2021}\)
\(=\left(2020\frac{2018}{2021}-2019\frac{2018}{2021}\right):\frac{2018}{2021}\)
\(=1:\frac{2018}{2021}=\frac{2021}{2018}\)
Ta có:
7/6 = 6/6 + 1/6 = 1 + 1/6
9/8 = 8/8 + 1/8 = 1 + 1/8
Vì 1/6 > 1/8
=> 1 + 1/6 > 1 + 1/8
=> 7/6 > 9/8
\(\frac{7}{6};\frac{9}{8}\)
\(\frac{28}{24};\frac{27}{24}=\frac{28}{24}>\frac{27}{24}\)
\(\frac{7}{6}>\frac{9}{8}\)
K mình nha Công Chúa Họ NGuyễn
\(\frac{3}{4}\)x X : \(\frac{1}{2}\)= \(\frac{4}{5}\)
\(\frac{3}{4}\)x X= \(\frac{4}{5}\)x \(\frac{1}{2}\)
\(\frac{3}{4}\)x X= \(\frac{2}{5}\)
x= \(\frac{2}{5}\): \(\frac{3}{4}\)
x= \(\frac{2}{5}\)x \(\frac{4}{3}\)
x= \(\frac{8}{15}\)
tk nhé
a) ta có : 60/204= 60:12/204:12 =5/7
suy ra : x = 5
b) 7/11 = 7x3/11x3 = 21/33
suy ra 6+x = 21
x = 21 -6
x = 15
ý c) bạn làm tương tự nhé
Help me