1. Check if (a) 25 × (–21) = (–25) × 21 (b) (–23) × 20 = 23 × (–20)
Write five more such examples.
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(a) 25 \times (-21) = (-25) \times 21
L.H.S = 25 \times (-21) = -(25\times21) = -525
R.H.S = (-25) \times 21 = -(25\times21) = -525
Therefore, L.H.S = R.H.S
(b) (-23) \times 20 = 23 \times (-20)
L.H.S = (-23) \times 20 = -(23\times20) = -460
R.H.S = 23 \times (-20) = -(23\times20) = -460
Therefore, L.H.S = R.H.S
Five more examples:
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