Question

7. Simplify:
(a) (-7)2 x 32
(e) 42 x (-5)3 x 3
(c)(-2) x 32 x 5
(d) 72x22(-5)
(b) (-12)- * (-4)
(f) 4 x 5 x 20-​

Answer 1

Answer:

a) (-7) 2 x 32

-14x32 = -448

e) 42 x (-5)3 x 3

42 x -15 x 3 = -1890

c) (-2) x 32 x 5 = -320

d) 72 x 22(-5)

72 x (-110) = -7920

b) (-12) x (-4) = 48

f) 4 x 5 x 20 = 400

Answer 2

GIVEN:-

(a) (-7)2 x 32

(e) 42 x (-5)3 x 3

(c)(-2) x 32 x 5

(d) 72x22(-5)

(b) (-12)- * (-4)

(f) 4 x 5 x 20

SOLUTION:-

(a)

》 -7(2) × 32

》 -14 × 32

》 -448

(e)

》 42 × -5(3)×3

》42 × -15 × 3

》 42 × -45

》 -1890

(c)

》(-2)×32×5

》-2 × 160

》-320

(d)

》72×22(-5)

》72×-110

》-7920

(b)

》-12 × -4

》48

(f)

》4×5×20

》20×20

》400

FORMULAS OR RULES:-

▪ We should follow the question firstly and analyze rhe process to find the value.

▪Then must follow the "+ & -" values.

▪We follow below conditions 》

+ × + = +

+ × - = -

- × + = -

- × - = +

▪ We get exact values by using above formulas.