1. © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 Objective: Count back to subtract whole numbers and numbers with one decimal place.

2. © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 Do you remember how to use counting back in 10s and 1s to subtract a 2-digit number? 1237 – 23 = 1237 -20 -3 1214 < < 1217

3. © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 You can also count back in 10s and adjust your answer: 1237 -30 +1 1208 < < 1207 1208 1237 – 29 =

4. Use the same strategies to subtract decimals… © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 48.6 -2 -0.1 < < 46.6 48.6 - 2.1 = 45.7 45.6 48.6 -3 +0.1 < < 48.6 - 2.9 = 46.5

5. Work with a partner to sketch number line jottings for at least 3 of these… © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 84.6 - 6.1 47.2 - 6.4 54.2 - 5.9 48.6 - 2.9 76.8 - 5.5 < <

6. © Hamilton Trust Keeping Up Term 3 Week 8 Day 1 Write 28 at the top of a sheet of paper. Subtract your choice of the numbers in the box below (only once each) from 28, writing the new number underneath. Keep subtracting… How close can you get to 10 in 3 minutes? Can you get to 0 in 3 minutes…?! 4.32.95.5 3.86.17.2 8.42.73.9