Find the sum of- -3 MARKS- 1-7-2-3-5-2- -5-12

Calculation : 2 Marks Result : 1 Mark 1/7 + (2/3×5/2) + 5/12 1/7 + (5/3) 5/12 12 + 140 35/84 (LCM of 7, 3, 12 = 84) 117/84 ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VII

Mathematics

Addition of Rational Numbers

Find the sum ...

Question

Find the sum of: [3 MARKS]
$\frac{1}{7}, (\frac{2}{3} \times \frac{5}{2}), \frac{- 5}{12}$

Open in App

Solution

Calculation : 2 Marks
Result : 1 Mark

$\frac{1}{7} + (\frac{2}{3} \times \frac{5}{2}) + \frac{- 5}{12}$
$\frac{1}{7} + (\frac{5}{3}) - \frac{5}{12}$
$\frac{12 + 140 - 35}{84}$ (LCM of 7, 3, 12 = 84)
$\frac{117}{84}$

Suggest Corrections

Similar questions

Q. (a) Find the sum of:

\frac{1}{7}, (\frac{2}{3} \times \frac{5}{2}), \frac{- 5}{12}

(b) If

\frac{- 5}{7} = \frac{x}{28}

. Find

x

\frac{3}{7} \div (\frac{21}{- 55})

[3 MARKS]

Q. Find the sum of:

(a)

\frac{- 3}{11}, \frac{- 1}{4}

and

\frac{5}{8}

(b)

\frac{- 5}{9}, \frac{- 7}{12}

and

\frac{11}{18}

[2 MARKS]

Q. Find the sum of the following infinite series

1 + \frac{\sqrt{2} - 1}{2 \sqrt{3}} + \frac{3 - 2 \sqrt{2}}{12} + \frac{5 \sqrt{2} - 7}{24 \sqrt{3}} + \frac{17 - 12 \sqrt{2}}{144} + . . . . .

Find the sum of the series $\frac{1^{3}}{1} + \frac{1^{3} + 2^{3}}{1 + 3} + \frac{1^{3} + 2^{3} + 3^{3}}{1 + 3 + 5} + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12 t e r m s$

Q. Factorize and then divide

5 x^{3} + 16 x^{2} + 12 x

(x + 2)

. Find the value of

5 x^{3} + 16 x^{2} + 12 x

for

x = 3.

[4 MARKS]

Join BYJU'S Learning Program

Find the sum of: [3 MARKS] 17,(23×52),−512

Calculation : 2 Marks Result : 1 Mark 17+(23×52)+−512 17+(53)−512 12+140−3584 (LCM of 7, 3, 12 = 84) 11784

Find the sum of: [3 MARKS]
$\frac{1}{7}, (\frac{2}{3} \times \frac{5}{2}), \frac{- 5}{12}$

Calculation : 2 Marks
Result : 1 Mark

$\frac{1}{7} + (\frac{2}{3} \times \frac{5}{2}) + \frac{- 5}{12}$
$\frac{1}{7} + (\frac{5}{3}) - \frac{5}{12}$
$\frac{12 + 140 - 35}{84}$ (LCM of 7, 3, 12 = 84)
$\frac{117}{84}$