1. Dollars and Bills I am learning to add integers (positive and negative numbers). e.g. -5 e.g. +5

2. SAMPLE PROBLEM Susan finds $7 in her piggy bank. +7 + …… = ….. Unfortunately she owes her sister $5. Recorded as -5 ……… + …… = ….. Recorded as +7 +7 + -5 = …..

3. SAMPLE PROBLEM =7 + -5 = …... These are the coins that Susan has ($7). This is the amount of money she owes her sister ($5).

4. SAMPLE PROBLEM Step 1: She must use some of the money to pay back her sister. That means she is left with $2 + 5 + - 5 = 0 So… +7 + -5 = 2 =7 + -5 = …... The amount of money she now owes her sister.

5. Now let’s try one together Step 1: We need to split the 8 so that some of it can be used to pay back the $3 we owe. On a piece of paper split the $8 into $3 (to pay back the debt) and the amount you will have left over. Do this now. +8 + -3 = ….

6. Now let’s try one together Step 2: Now use the $3 to pay back the debt. Write the equation that shows this on your paper now. +8 + -3 = ….

7. Now let’s try one together Step 3: We now know what’s left so it’s time to answer our question. On paper write your answer to +8 + -3 = ? +8 + -3 = ….

8. Now try these questions on your own. 1)6 + -3 = …. 2)9 + -4 = …. 3)12 + -8 = …. 4)13 + -7 = …. 5)17 + -4 = …. 6) 14 + -8 = …. 7) 12 + -5 = …. 8) 19 + -12 = …. 9) 15 + -6 = …. 10) 18 + -2 = ….

9. Only click again if you have completed all the questions on the previous slide and you are ready to see the answers. 1)3 2)5 3)4 4)6 5)13 6) 6 7) 7 8) 7 9) 9 10) 16 Need some more practise? Try Pg65 of Teacher Tools Addition and Subtraction Book Numeracy resourcesNumeracy resources