Starter quiz
- Which number represents the subtrahend in this equation? 31 − 10 = 21
- 31
- 21
- 10 ✓
-
- What is the difference between 19 and 21?
- '2' ✓
- What is 100 − 30 = ______
- '70' ✓
- What is 200 − 50 = ______
- '150' ✓
- Calculate the missing number is this equation: 40 + ___ = 220
- 160
- 170
- 180 ✓
- 200
-
- Which pairs of numbers have a sum of 600?
- 100 and 400
- 200 and 500
- 300 and 300 ✓
- 200 and 400 ✓
-
Exit quiz
- Which number in this equation is the minuend? 63 = 103 − 40
- 40
- 63
- 103 ✓
-
- What is the difference between 190 and 210?
- '20' ✓
- Calculate the missing number in this equation: ______ − 30 = 60
- '90' ✓
- Calculate the missing number in this equation: 63 − ______ = 20
- '43' ✓
- Match up the differences with the correct expression to complete each equation.
- 26 =⇔36 − 10 ✓
- 46 =⇔66 − 20 ✓
- 64 =⇔84 − 20 ✓
- 34 =⇔44 − 10 ✓
- Sylvie the snail creeps 130 cm towards home. She still has 105 cm to go before she gets there. How many cm will she have travelled altogether? ______ cm
- '235' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Equations can be represented using part-part-whole or bar models.
- If the minuend is missing, you add the subtrahend and difference.
- To find a missing part in a subtraction equation, subtract the other part from the whole.
Common misconception
Pupils may rely on the same strategies to solve all problems and may find it hard to remember when to add to find the missing part and when to subtract.
Emphasise the use of bar models, especially for pupils who are struggling. This will help them identify whether a part is missing or if the whole is missing, and whether they should add the parts or subtract a part from the whole to get the answer.
Keywords
Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another.
Difference - The difference is the result after subtracting one number from another.
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