Advertisements
Advertisements
Question
Starting from (−1) × 5, write various products showing some pattern to show (−1) × (−1) =1.
Advertisements
Solution
−1 × 5 = −5
−1 × 4 = −4 = − 5 + 1
−1 × 3 = −3 = − 4 + 1
−1 × 2 = −2 = − 3 + 1
−1 × 1 = −1 = − 2 + 1
−1 × 0 = 0 = − 1 + 1
Therefore, −1 × (−1) = 0 + 1 = 1
APPEARS IN
RELATED QUESTIONS
Replace the blank with an integer to make it a true statement
(–3) × _____ = 27
Replace the blank with an integer to make it a true statement.
_____ × (–12) = 132
−80 × ____ = −80
During summer, the level of the water in a pond decreases by 2 inches every week due to evaporation. What is the change in the level of the water over a period of 6 weeks?
11 × (−1) = ______
(−12) × (−9) = _______
Which of the following is the multiplicative identity for an integer a?
11 × (–5) = – (_____ × _____) = _____.
88 × ______ = –88
(–1) is not a multiplicative identity of integers.
