What are (i) - 5 + 0 (ii) 7 + (- 7) (iii) -10 + 20 (iv) 10 - 20 (v) 7 - (- 7) Class 6
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What are (i) - 5 + 0 (ii) 7 + (- 7) (iii) -10 + 20 (iv) 10 - 20 (v) 7 - (- 7) Class 6
Question 1.
What are Class 6
(i) - 5 + 0
(ii) 7 + (- 7)
(iii) -10 + 20
(iv) 10 - 20
(v) 7 - (- 7)
(vi) - 8 - (- 10)?
Solution:
(i) -5, (ii) 0, (iii) +10, (iv) -10, (v) +14, (vi) +2.
Question 2.
Use unmarked number lines to evaluate these expressions: Class 6
(a) - 125 + (- 30) = _____
(b) + 105 - (- 55) = _____
(c) + 80 - (- 150) = ______
(d) - 99 - (- 200) = ______
Solution:
(a) - 125 + (- 30) = - 155
(b) + 105 - (- 55) = + 160
(c) + 80 - (- 150) = + 230
(d) - 99 - (- 200) = + 101
Question 3.
Complete the additions using tokens. Class 6
(a) (+ 6) + (+ 4)
(b) (- 3) + (- 2)
(c) (+ 5) + (- 7)
(d) (- 2) + (+ 6)
Solution:
(a) (+ 6) + (+ 4) = + 10
(b) (- 3) + (- 2) = - 5
(c) (+ 5) + (- 7) = - 2
(d) (- 2) + (+ 6) = + 4