Starter quiz
- Use column addition to calculate the sum of 4,352 and 2,217
- ' 6,569' ✓
- Use column addition to calculate the total of 5,653 and 124
- '5,777' ✓
- Use column subtraction to calculate how much more 8,976 is than 2,346
- '6,630' ✓
- Use column subtraction to calculate the difference between 9,367 and 452
- '8,915' ✓
- Lucas wins £3,469 in a game he is playing with Aisha. In his next turn, he has to give £527 to Aisha. How much money does he have left? £ ______
- '2,942' ✓
- Aisha wins £5,680 in the game that she is playing with Lucas. In her next turn, she wins another £719 How much money does she have now? £______
- '6,399' ✓
Exit quiz
- Calculate the sum of 3,409,807 and 2,610,155 You may wish to use a column method.
- '6,019,962' ✓
- Calculate the difference between 5,682,743 and 1,225,130 You may wish to use a column method.
- '4,457,613' ✓
- Find the combined total of 1,246,982 and 391,011 You may wish to use a column method.
- '1,637,993' ✓
- Calculate how much more 3,629,980 is than 245,561
- '3,384,419' ✓
- Aisha wins 1,354,906 points in a game then wins another 64,002 points and finally wins another 305,690 points. How many points has she won altogether? ______ points
- '1,724,598' ✓
- Lucas wins 2,308,570 points in his game. He then loses 150,625 points before losing another 1,350,000 points. How many points does he end the game with? ______ points
- '807,945' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- When solving problems, the column addition and column subtraction algorithms are sometimes the most efficient methods.
- If the numbers have different amounts of digits, ensure the digits are aligned in their appropriate place value columns.
- Identify when regrouping is needed when carrying out column addition and subtraction.
Common misconception
Mis-align numbers when setting up algorithms if the numbers have different amount of digits. When finding 1 missing part out of 3 parts, children may perform two subtractions, which is inefficient.
When setting up the algorithm, ensure digits in the same place value place are aligned. When finding 1 missing part of 3 parts, first we add the known parts then we subtract from the whole.
Keywords
Regroup - The process of unitising and exchanging between place values is known as regrouping. For example, 10 tens can be regrouped for one hundred; one hundred can be regrouped for 10 tens.
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