Q 25 Multiply: (i) -25 by 11. (ii) -15 by -12. (iii) O by- 33.
Q 26 Evaluate: (i) 14+7 (ii) 16+(-8) (ii) (-23) + (-11)
Q 27 Find the product: (i) 2 4-6 (ü)-5-6-7
Q 28 Fill in the blanks: (i) {(-25) + (-33)} + (-82) = (-25) + {(-33) + ()} (i)(-77) =_
Q 29 Simplify: {(-10)-(-5)} + {(-22) + (-40)
Q 30 The sum of two integers is -25. If one of them is -30, find the value of the other.
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Q 31 If a = -5, b = -6 and c = 8, then show that (i) (a + b)+c= a + (b + c), (ii) (a - b) (6-a).
Q 32 Simplify. (1) (-25) 72 + (-25) 42 (ii) 8 13 +8 (-7)
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