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Standard VII

Mathematics

Finding the Value of an Expression

Which out of ...

Question

Which out of the following are expressions with numbers only?

(a) y + 3 (b) (7 × 20) − 8z

(c) 5 (21 − 7) + 7 × 2 (d) 5

(e) 3x (f) 5 − 5n

(g) (7 × 20) − (5 × 10) − 45 + p

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Solution

It can be observed that the expressions in alternatives (c) and (d) are formed by using numbers only.

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Question 2

In which of the following expressions only numbers are used:

(a) y + 3

(b) $(7 \times 20) - 8 z$

(c) $5 (21 - 7) + 7 \times 2$

(d) 5

(e) 3x

(f) 5-5n

(g) $(7 \times 20) - (5 \times 10) - 45 + p$

Q. Which out of the following are expression with numbers only?
(a)

y + 3

(b)

(7 \times 20) - 8 z

(c)

5 (21 - 7) + 7 \times 2

(d)

5

(e)

3 x

(f)

5 - 5 n

(g)

(7 \times 20) - (5 \times 10) - 45 + p

Q. Which of the following are expression with number only?

(7 \times 20) - (5 \times 10) - 45 + p

Q. Which of the following are expressions with numbers only?
(a)

y + 3

(b)

(720) 8 z

(c)

5 (217) + 72

(d)

5

(e)

3 x

(f)

55 n

(g)

(720) (510) 45 + p

Q. Which of the following statements are true:

(i) 10

\div

(5 × 2) = (10

\div

5) × (10

\div

2)
(ii) (35 − 14)

\div

7 = 35

\div

7 − 14

\div

7
(iii) 35 − 14

\div

7 = 35

\div

7 − 14

\div

7
(iv) (20 − 5)

\div

5 = 20

\div

5 − 5
(v) 12 × (14

\div

7) = (12 × 14)

\div

(12 × 7)
(vi) (20

\div

\div

2 = (20

\div

\div

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Which out of the following are expressions with numbers only? (a) y + 3 (b) (7 × 20) − 8z (c) 5 (21 − 7) + 7 × 2 (d) 5 (e) 3x (f) 5 − 5n (g) (7 × 20) − (5 × 10) − 45 + p

It can be observed that the expressions in alternatives (c) and (d) are formed by using numbers only.

Which out of the following are expressions with numbers only?

(a) y + 3 (b) (7 × 20) − 8z

(c) 5 (21 − 7) + 7 × 2 (d) 5

(e) 3x (f) 5 − 5n

(g) (7 × 20) − (5 × 10) − 45 + p