Find the following products. (a) 4 × (- 3); (b) (- 6) × (- 3); (c) (- 5) × (- 1); (d) (- 8) × 4: Class 7

Find the following products. (a) 4 × (- 3); (b) (- 6) × (- 3); (c) (- 5) × (- 1); (d) (- 8) × 4:Class 7

Question 1.

Find the following products: Class 7

(a) 4 × (- 3)

(b) (- 6) × (- 3)

(c) (- 5) × (- 1)

(d) (- 8) × 4

(e) (- 9) × 10

(f) 10 × (- 17)

Solution:

(a) -12

(b) 18

(c) 5

(d) -32

(e) -90

(f)-170

Question 2.

Is this true for all negative integers too? Class 7

Solution:

Yes

Question 3.

In the case of integers, is the product the same when we swap the multiplier and the multiplicand? Try this for some numbers. Class 7

Solution:

Yes

Observe the following pairs of multiplications (fill in the blanks where needed) : Class 7

3 × - 4 = -12

- 4 × 3 = -12

- 30 × 12 = _______

12 × - 30 = _______

-15 × - 8 = 120

- 8 × -15 = 120

14 × - 5 = –70

- 5 × _____ = - 70

Sol.

3 × - 4 = -12

-4 × 3 = -12

- 30 × 12 = -360

12 × - 30 = -360

-15 × - 8 = 120

- 8 × -15 = 120

14 × - 5 = -70

- 5 × 14 = - 70