The numerical expression 3-8-5-7 equal to -19-56 states that-

The correct option is B addition of rational numbers is not commutative 3/8 + 5/7 = 19/56 shows that on adding two rational numbers we get another rational n ...

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Standard IX

Mathematics

Geometrical Method to Find Square Root of a Number

The numerical...

Question

The numerical expression $\frac{3}{8}$ + ( $\frac{- 5}{7}$ ) equal to $\frac{- 19}{56}$ states that:

rational numbers are not closed under subtraction

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addition of rational numbers is not commutative

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rational numbers are closed under addition

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addition of rational numbers is commutative

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Solution

The correct option is B
addition of rational numbers is not commutative

$\frac{3}{8}$ + $\frac{- 5}{7}$ = $\frac{- 19}{56}$

shows that on adding two rational numbers we get another rational number.

$\Rightarrow$ Sum of two rational numbers is a rational number.

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Similar questions

The numerical expression $\frac{3}{8}$ + ( $\frac{- 5}{7}$ ) equal to $\frac{- 19}{56}$ shows that:

The numerical expression

$\frac{3}{8} + (\frac{- 5}{7}) = \frac{- 19}{56}$

states that ______.

Question 3
The numerical expression $\frac{3}{8} + \frac{(- 5)}{7} = \frac{- 19}{56}$ shows that:
(a) rational numbers are closed under addition.
(b) rational numbers are not closed under addition.
(c) rational numbers are closed under multiplication.
(d) addition of rational numbers is not commutative.

8 \times \frac{3}{19} \times \frac{38}{56} =

\frac{x}{7}

. Find x.

Fill in the blanks.

(i) $(\frac{- 3}{17}) + (\frac{- 12}{5}) = (\frac{- 12}{5}) + (. . . . .)$

(ii) $- 9 + \frac{- 21}{8} = (. . . . . .) + (- 9)$

(iii) $(\frac{- 8}{13} + \frac{3}{7}) + (\frac{- 13}{4}) = (. . . . . .) + [\frac{3}{7} + (\frac{- 13}{4})]$

(iv) $- 12 + (\frac{7}{12} + \frac{- 9}{11}) = (- 12 + \frac{7}{12}) + (. . . . .)$

(v) $\frac{19}{- 5} + (\frac{- 3}{11} + \frac{- 7}{8}) = {\frac{19}{- 5} + (. . . . .)} + \frac{- 7}{8}$

(vi) $\frac{- 16}{7} + . . . . . = . . . . . . + \frac{- 16}{7} = \frac{- 16}{7}$

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The numerical expression 38 + (−57) equal to −1956 states that:

The correct option is B addition of rational numbers is not commutative 38 + −57 = −1956 shows that on adding two rational numbers we get another rational number. ⇒ Sum of two rational numbers is a rational number.

The numerical expression $\frac{3}{8}$ + ( $\frac{- 5}{7}$ ) equal to $\frac{- 19}{56}$ states that:

The correct option is B
addition of rational numbers is not commutative

$\frac{3}{8}$ + $\frac{- 5}{7}$ = $\frac{- 19}{56}$

shows that on adding two rational numbers we get another rational number.

$\Rightarrow$ Sum of two rational numbers is a rational number.