Question

Find the product, using suitable properties:
(a) 26 × (– 48) + (– 48) × (–36)
(b) 8 × 53 × (–125)
(c) 15 × (–25) × (– 4) × (–10)
(d) (– 41) × 102
(e) 625 × (–35) + (– 625) × 65
(f) 7 × (50 – 2)
(g) (–17) × (–29)
(h) (–57) × (–19) + 57
NCERT Class 7th Mathematics Chapter 1 Integers

Answer 1

PEMDAS is the order of operation.
Parenthesis; Exponents; Multiply; Divide; Add; Subtract.

(a) 26 × (– 48) + (– 48) × (–36) ⇒ -1248 + 1728 = 480

(b) 8 × 53 × (–125) ⇒ 424 x -125 = -53,000

(c) 15 × (–25) × (– 4) × (–10) ⇒ 15 * -1000 = -15,000

(d) (– 41) × 102 = -4182

(e) 625 × (–35) + (– 625) × 65 ⇒ -21875 + (-40625) = -62,500 

(f) 7 × (50 – 2) ⇒ 7 * 48 = 336

(g) (–17) × (–29) = 493

(h) (–57) × (–19) + 57 ⇒ 1,083 + 57 = 1,140

Answer 2

Answer:

(a) answer -0

(b) answer - -53000

(c) answer- -15000

(d) answer- -4182

(e) answer- -62500

(f) answer- 336

(g) answer - 493

(h) answer - 1140