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  • Observe the following patterns and fill in the blanks to make the statements true: (a) – 5 × 4 = – 20 – 5 × 3 = – 15 = –20 – ( – 5)

Observe the following patterns and fill in the blanks to make the statements true:

(a) – 5 × 4 = – 20
– 5 × 3 = – 15 = –20 – ( – 5)
– 5 × 2 = _______ = – 15 – ( –5)
– 5 × 1 = _______ = _______
– 5 × 0 = 0 = _______
– 5 × – 1 = 5 = _______
– 5 × – 2 = _______ = _______

(b) 7 × 4 = 28
7 × 3 = _______ = 28 – 7
7 × 2 = __ __ = _______– 7
7 × 1 = 7 = _______ – 7
7 × 0 = _______ = _______ –________
7 × – 1 = –7 = _______ – _______
7 × – 2 = _______ = _______ – _______
7 × – 3 _______ = _______ – ________

Answers (1)

(a)

-5 x 2 = -15 - (-5)
-5 x 1 = -5 = - 10 - (-5)
-5 x 0 = 0 =-5 - (-5)
-5 x -1 = 5 = 0 - (-5)
- 5 x - 2 =10 = 5 - (-5)

(b)

7 x 3 = 21 = 28 - 7
7 x 2 = 14 = 21 - 7
7 x 1 = 7  = 14 - 7
7 x 0 = 0 = 7- 7
7 x (-1) = -7 = 0 - 7
7 x (- 2) = - 14 = -7 - 7
7 x (- 3) = -21 = - 14 - 7

Posted by

Ravindra Pindel

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