1. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Objective: Use written column addition to efficiently add three or four-digit whole numbers.

2. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Step 1: Write the numbers in columns, one above the other. 100s 10s 1s 8 5 6 + 3 6 8 Step 2: Add the ones. Write the tens in the 10s column. 100s 10s 1s 8 5 6 + 3 6 8 1 4 Hint: Leave a space before drawing the line so you have somewhere to write the extra tens and hundreds digits.

3. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Step 3: Add the tens, including the extra ten. Write the hundreds in the 100s column. 100s 10s 1s 8 5 6 + 3 6 8 1 1 2 4 Step 4: Add the hundreds, writing the extra thousand in the thousands column. 1000s 100s 10s 1s 8 5 6 + 3 6 8 1 1 1 1 2 2 4 Hint: Check that your answer looks reasonable!

4. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Choose pairs to add using column addition… to make the total nearest 1000. 1000s 100s 10s 1s 4 3 5 + 5 6 9 1000s 100s 10s 1s 4 3 5 + 5 6 9 587 Hint: Lay the sum out like the first one. Remember to leave a space before the line! 724 435 834 236 827 569

5. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Step 1: Write the numbers in columns, one above the other. 1000s 100s 10s 1s 7 5 4 5 + 4 9 2 8 Step 2: Add the ones. Write the tens in the 10s column. 1000s 100s 10s 1s 7 5 4 5 + 4 9 2 8 1 3 Remember to leave a space before drawing the line.

6. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Step 3: Add the tens, including the extra ten. Write the hundreds in the 100s column. 1000s 100s 10s 1s 7 5 4 5 + 4 9 2 8 1 7 3 Step 4: Add the hundreds writing the extra thousand in the thousands column. 1000s 100s 10s 1s 7 5 4 5 + 4 9 2 8 1 1 4 7 3

7. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Step 5: Complete the addition by adding the thousands. Be ready to write the extra ten thousand. 10000s 1000s 100s 10s 1s 7 5 4 5 + 4 9 2 8 1 1 1 1 2 4 7 3 Check that your answer looks reasonable!

8. © Hamilton Trust Keeping Up Term 3 Week 2 Day 1 Add each set of numbers. Hint: Remember to leave a space before you draw the line! 1. 635 + 387 2.2097 + 5653 3.1959 + 2844 4.7615 + 2748 5.6854 + 8693 1. 635 + 387 2.2097 + 5653 3.1959 + 2844 4.7615 + 2748 5.6854 + 8693