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Multiplication Trick for a Table

Find the larg...

Question

Find the larger one of each pair below, doing the computations in head.

(i)

(ii)

(iii)

(iv)

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Solution

(i)

As 18 > 12, > .

⇒>

Thus, is larger than.

(ii)

As 45 > 44, > .

⇒>

Thus, is larger than.

(iii)

As 0.5 > 0.2 , > .

⇒>

Thus, is larger than.

(iv)

As > , > .

⇒>

Thus, is larger than.

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Similar questions

Find the larger in each pair of these numbers. Subtract the smaller from the larger of these pairs.

(i)

(ii)

(iii)

(iv)

Some problems to do in your head.

(i)

(ii)

(iii)

(iv) 0.5 × (−0.3)

Express each one of the following with rational denominator :

(i) $\frac{1}{3 + \sqrt{2}}$

(ii) $\frac{1}{\sqrt{6} - \sqrt{5}}$

(iii) $\frac{16}{\sqrt{41} - 5}$

(iv) $\frac{30}{5 \sqrt{3} - 3 \sqrt{5}}$

(v) $\frac{1}{2 \sqrt{5} + \sqrt{3}}$

(vi) $\frac{3 \sqrt{3} + 1}{2 \sqrt{2} - \sqrt{3}}$

(vii) $\frac{6 - 4 \sqrt{2}}{6 + 4 \sqrt{2}}$

(viii) $\frac{3 \sqrt{2} + 1}{2 \sqrt{5} - 3}$

(ix) $\frac{b^{2}}{\sqrt{a^{2} + b^{2} + a}}$

Q. Draw a number line and represent each of the following on it:

(i)

5 + (- 2)

(- 9) + 4

(- 3) + (- 5)

6 + (- 6)

(- 1) + (- 2) + 2

(- 2) + 7 + (- 9)

Q. Which number is larger in each of the following pairs?
(i) 0, −2
(ii) −3, −5
(iii) −5, 2
(iv) −16, 8
(v) −365, −913
(vi) −888, 8

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