Class 7 Mathematics English Ex - 1.2 Q. No. 1,2,3,4,5,6,7 Solution Scert Assam//Integers // D1X9L5
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Excersice 1.2
Class 7 Mathematics Ex: 1.2 Solution Scert
1. Find the product
(i) 5×(-2) (ii) (-3)×7 (iii) (- 4)×(-3)
(iv) (-129) (-1) (v) (-12) 0 (-17) (vi) (-22) (-11) 10
(vii) 13 (-5) (-3) (viii) (-27) (-31) (-2) (ix) (-3) (-1) (-2)5
2. Verify whether true or false
(i) 27{(-5)+10}= 27(-5) + 2710
(ii) (-25){(-16)+(-24)} = (-25) (-16)(-24)
(iii) a- (-b) = a+b, where a = (-75), b = (-20)
3. (i) Product of any two integers is -33. If one of them is 11, what is the other number?
(ii) Product of any two integers is 51. If one of them is -1, what is the other number?
(iii) What is the value of (-1a) for any integer ‘a’?
4. Find the product applying appropriate property-
(i) 125 (-54) 8 (ii) (-25) (-97) 4
(iii) (-27) (-33) (iv) 25 (-58) + (-58)(-35)
(v) 15 (-25) (-4)(-10) (vi) (-57) (-19) 57
5. Evaluate with the help of distributive and associative property :
(i) 125(54) 8 (ii) (-25)758 (-4)
(iii) 225673
6. Evaluate using distributive property :
(i) 17225+172 35 (ii) 15982+159 16+1592
(iii) 6778+67 (-43)+67(-25) (iv) 99999+99
(v) 5847 +94
7. Justify whether right or wrong :
(i) (-7)15(-4) = (-7)15+ (-7)(-4) (ii) (-6)23(-2) = (-2) (-6)23
(iii) (-5) {(-3)2} = {(-5)(-3)}2 (iv) (-175) (-1) = -175
v) (-25) (-4)0 = 100
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