Q.1. Divide:
(i) 102 by 17
(ii) −85 by 5
(iii) −161 by −23
(iv) 76 by −19
(v) 17654 by −17654
(vi) (−729) by (−27)
(vii) 21590 by −10
(viii) 0 by −135
Ans:
(i) 102 ÷ 17 = = = 6
(ii) −85 ÷ 5 = − = − = − 17
(iii) −161 ÷ ( − 23) = == 7
(iv) 76 ÷ − 19 = − = = − 4
(v) 17654 ÷ (− 17654) = − |= −= − 1
(vi) (−729) ÷ (− 27) = = = 27
(vii) 21590 ÷ − 10 = − = −= − 2159
(viii) 0 ÷ (−135) = −= −= 0
Q.2. Fill in the blanks:
(i) 296 ÷ ... = −148
(ii) −88 ÷ ... = 11
(iii) 84 ÷ ... = 12
(iv) ....... ÷ −5 = 25
(v) ....... ÷ 156 = −2
(vi) ....... ÷ 567 = −1
Ans:
(i) 296 ÷ −148 = = 2
∴ 296 ÷ (−2) = −148
(ii) − 88 ÷ 11 = = - 8
∴ −88 ÷ −8 = 11
(iii) 84 ÷ 12 = = 7
(iv) 25 × (−5) = −125
∴ −125 ÷ −5 = 25
(v) 156 × (−2) = −312
∴ −312 ÷ 156 = −2
(vi) 567 × (−1) = −567
∴ −567 ÷ 567 = −1
Q.3. Which of the following statements are true?
(i) 0 ÷ 4 = 0
(ii) 0 ÷ (−7) = 0
(iii) −15 ÷ 0 = 0
(iv) 0 ÷ 0 = 0
(v) (−8) ÷ (−1) = −8
(vi) −8 ÷ (−2) = 4
Ans:
(i)
LHS == 0
= RHS
Because LHS is equal to RHS, the equation is true.
(ii)
LHS == -0 = 0
= RHS
Because LHS is equal to RHS, the equation is true.
(iii)
LHS == Not defined
≠RHS
Because LHS is not equal to RHS, the equation is false.
(iv)
LHS == Not defined
≠RHS
Because LHS is not equal to RHS, the equation is false.
(v)
LHS = = 8
≠ RHS
Because LHS and RHS are not equal, the equation is false.
(vi)
LHS = = 4
= RHS
Because LHS is equal to RHS, the equation is true.
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1. What are integers? |
2. How are integers represented on a number line? |
3. What is the difference between positive and negative integers? |
4. How can integers be added and subtracted? |
5. Can integers be multiplied and divided? |
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