?

TL

2/5+2/3+3/4=109/60

1/3+5/12+5/6=19/12

1/6+5//24+2/3=25/24

nha bn

HT

a, \(\frac{2}{5}+\frac{2}{3}+\frac{3}{4}=\frac{24}{60}+\frac{40}{60}+\frac{45}{60}=\frac{109}{90}\)

b, \(\frac{1}{3}+\frac{5}{12}+\frac{5}{6}=\frac{4}{12}+\frac{5}{12}+\frac{10}{12}=\frac{19}{12}\)

c, \(\frac{1}{6}+\frac{5}{24}+\frac{2}{3}=\frac{4}{24}+\frac{5}{24}+\frac{16}{24}=\frac{25}{24}\)

#Fox

TL:

\(\frac{2}{5}+\frac{2}{3}+\frac{3}{4}=\frac{109}{60}\)

_HT_

Bài 3:
\(\frac{2}{5}+\frac{2}{3}+\frac{3}{4}=\frac{24}{60}+\frac{40}{60}+\frac{45}{60}=\frac{109}{60}\)

#Fox

a)  2/5   +   2/3  +   3/4    =   109/60

31035 nha bạn

a. x - 2/5 = 2/3

            x = 2/3 + 2/5

            x = 16/15

TL:

\(A.X-\frac{2}{5}=\frac{2}{3}\)

\(X=\frac{2}{3}+\frac{2}{5}\)

\(X=\frac{16}{15}\)

_HT_

Bài 3:

\(\frac{1}{3}+\frac{5}{12}+\frac{5}{6}=\frac{4}{12}+\frac{5}{12}+\frac{10}{12}=\frac{19}{12}\)

#Fox

cho công thức nà đáy = diện tích : chìu cao

:)????

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\(\left(x+2\right)+\left(x+4\right)+\left(x+6\right)+\left(x+8\right)+...+\left(x+32\right)=336\)

\(\Rightarrow x\left[\left(32-2\right):2+1\right]+2+4+6+...+32=336\)

\(\Rightarrow16x+\left[\left(32+2\right)\text{x}16:2\right]=336\)

\(\Rightarrow16x+34\text{x}8=336\)

\(\Rightarrow16x+272=336\)

\(\Rightarrow16x=336-272\Leftrightarrow16x=64\)

\(\Rightarrow x=64:16\Leftrightarrow x=4\)

TL

a) 2/5 +2/3 + 3/4=109/60

1/3+5/12+5/6=19/12

1/6+5/24+2/3=25/24

nha bn

HT

a)  2/5 + 2/3  + 3/4 = 109/60

b) 1/3 + 5/12 + 5/6 = 19/12

c) 1/6 + 5/24 + 2/3 = 25/24