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2. Say true or false
(i) (−675) − (−400) = −1075
(ii) 15 − (−18) is the same as 15 +18
(iii) (−45) − (−8) = (−8) − (−45)
3. Find the value of the following
(i) –3–(–4) using number line (ii) 7–(–10) using number line
(iii) 35 – (−64) (iv) −200 – (+100)
4. Kabilan was having 10 pencils with him. He gave 2 pencils to Senthil and 3 to Karthik. Next day his father gave him 6 more pencils, from that he gave 8 to his sister. How many pencils are left with him?
5. A lift is on the ground floor. If it goes 5 floors down and then moves up to 10 floors from there. Then in which floor will the lift be?
6. When Kala woke up, her body temperature was 102°F. She took medicine for fever. After 2 hours it was 2°F lower. What was her temperature then?
7. What number should be added to (–17) to get (–19)?
8. A student was asked to subtract (–12) from (–47). He got −30. Is he correct? Justify.
Objective type questions
9. (−5)− (−18) = ____
(i) 23 (ii) –13 (iii) 13 (iv) –23
10. (−100)− 0 +100 = ____
(i) 200 (ii) 0 (iii) 100 (iv) −200