Objectives: • Use column addition to add pairs of whole four-digit numbers; • Choose a method to add whole numbers. © Hamilton Trust Keeping Up Term 3 Week 7 Day 2 Decide which of these number sentences has the largest total, and which has the smallest. 4782 + 3236 5320 + 1456 3053 + 4879 © Hamilton Trust Keeping Up Term 3 Week 7 Day 2 Use column addition to check one of the calculations Step 1: Write the numbers in columns, one above the other. 1000s 100s 10s 1s Step 2: Add the ones. Write the tens in the 10s column 1000s 100s 10s 1s 4 +3 4 +3 8 7 9 0 5 3 8 7 9 0 5 3 1 2 Remember to leave a space before drawing the line. © Hamilton Trust Keeping Up Term 3 Week 7 Day 2 © Hamilton Trust Step 3: Add the tens, including the extra one. Write the hundreds in the 100s column. 1000s 100s 10s 1s Step 4: Add the hundreds column. 4 +3 4 +3 8 7 9 0 5 3 1 1 3 2 1000s 100s 10s 1s 8 0 1 9 Keeping Up Term 3 7 9 5 3 1 3 2 Week 7 Day 2 Step 5: Complete the addition by adding the thousands. Be ready to write the extra ten thousand, if necessary. 1000s 100s 10s 1s 4 + 3 8 7 9 0 5 3 1 1 7 9 3 2 Check that your answer looks reasonable! © Hamilton Trust Keeping Up Term 3 Week 7 Day 2 You’ve done one of these sums. Now do the other two, using column addition. 5320 + 1456 4782 + 3236 3053 + 4879 © Hamilton Trust Keeping Up Term 3 Week 7 Day 2 Solve as many of these addition challenges as you can in 5 minutes…! 4682 + 1998 4300 + 2600 5724 + 6368 HINT! © Hamilton Trust 2917 + 3794 2100 + 4727 6003 + 4785 Watch out for any calculations you might be able to solve mentally! Keeping Up Term 3 Week 7 Day 2