Question

Solve the following word problems: -
1. What letters of the English alphabet have reflectional symmetry (i.e., symmetry related to mirror
reflection) about?
(a) a vertical mirror
(b) a horizontal mirror
(c) both horizontal and vertical mirrors

2.Find the product, using suitable properties:
(i )625 × (–35) + (– 625) × 65
(ii) (–57) × (–19) + 57

3. Verify (–30) × [13 + (–3)] = [(–30) × 13] + [(–30) × (–3)]

4. Arrange the following integers in the ascending order :
–2, 1, 0, –3, +4, –5

5. Mohan deposits Rs 5,000 in his bank account and withdraws Rs 3,642 from it, the next day. If withdrawal
of amount from the account is represented by a negative integer, then how will you represent the amount
deposited? Find the balance in Mohan’s account after the withdrawal.

6.Find each of the following products:
(i) (–18) × (–10) × 9
(ii) (–20) × (–2) × (–5) × 7

Answer 1

Step-by-step explanation:

olve the following word problems: -

1. What letters of the English alphabet have reflectional symmetry (i.e., symmetry related to mirror

reflection) about?

(a) a vertical mirror

(b) a horizontal mirror

(c) both horizontal and vertical mirrors

2.Find the product, using suitable properties:

(i )625 × (–35) + (– 625) × 65

(ii) (–57) × (–19) + 57

3. Verify (–30) × [13 + (–3)] = [(–30) × 13] + [(–30) × (–3)]

4. Arrange the following integers in the ascending order :

–2, 1, 0, –3, +4, –5

5. Mohan deposits Rs 5,000 in his bank account and withdraws Rs 3,642 from it, the next day. If withdrawal

of amount from the account is represented by a negative integer, then how will you represent the amount

deposited? Find the balance in Mohan’s account after the withdrawal.

6.Find each of the following products:

(i) (–18) × (–10) × 9

(ii) (–20) × (–2) × (–5) × 7