Åk 6–9

3.5 Exercises - Addition and Subtraction
1. Which calculation operation is shown on the number line? a) -4 + 5 = 1 b) 7 - 3 = 4 c) -3 -5 = -8 d) 2 + 6 = 8 2. Write a mathematical expression for the following sentences.
 Ex Nils gave away 4 of his 10 kr. 10 - 4 a) Jan had 5 points and lost  7. b) Nina missed 12 points and won 9. c) Lina gave away 4 of her 15 pieces of candy. d) Helen had 10 pens and lost 2 of them. e) Anna took 20 step forward and then took 7 steps back. f) The temperature rose 3 degrees from -10 degrees. g) The temperature fell 2 degrees from -6 degrees. h) The temperature rose from -5 degrees to 8 degrees. 3. Calculate and write the results.
 a) 9 - 2 = b) -5 + 8 = c) -3 - 10 = d) 15 - 11 = e) 25 + 4 = f) -9 + 6 = g) -7 - 8 = h) 8 - 20 = 4. Complete the table so that the equality is correct.
 Ex 2 + 1 = 3 a) 9 + (-5) = b) 3 + = 2 c) + 2 = -10 d) 7 + 1 = e) + 4 = -6 f) -6 + 7 = 5. Complete the table so that the equality is correct.
 a) 3 + (-3) = b) -5 + = 0 c) + (-4) = 0 d) + 8 = 0 e) -7 + = 0