Choose efficient approaches when subtracting mixed numbers
I can choose efficient approaches when subtracting mixed numbers.
Choose efficient approaches when subtracting mixed numbers
I can choose efficient approaches when subtracting mixed numbers.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Partitioning is a strategy that can be used to subtract mixed numbers.
- When partitioning, the whole number part and the fractional part of the minuend must be greater than the subtrahend's.
- Using number-sense can support us to determine the most efficient method to use when subtracting from mixed numbers.
Keywords
Mixed number - A mixed number is a whole number and a fraction combined.
Minuend - The minuend is the first number in a subtraction. The number from which another number is to be subtracted.
Subtrahend - The subtrahend is the number that is to be subtracted. The second number in a subtraction.
Common misconception
When partitioning to subtract, children may partition correctly but then may subtract incorrectly by swapping the order of the fractional parts being subtracted.
Is partitioning efficient for this subtraction where the fractional part of the subtrahend is greater than that of the minuend? It may be more efficient to 'find the difference' by counting on.
To help you plan your year 4 maths lesson on: Choose efficient approaches when subtracting mixed numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 4 maths lesson on: Choose efficient approaches when subtracting mixed numbers, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 2 maths lessons from the Efficient strategies for adding and subtracting mixed numbers (crossing a whole) unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
$$2{{4} \over {6}}$$ -
$$ {16} \over {6}$$
$$3{{4} \over {7}}$$ -
$$ {25} \over {7}$$
$$1{{6} \over {7}}$$ -
$$ {13} \over {7}$$
$$2{{1} \over {6}}$$ -
$$ {13} \over {6}$$
$$5{{3} \over {7}}$$ -
$$ {38} \over {7}$$
$$ {10} \over {6}$$ -
$$1{{4} \over {6}}$$
$$ {19} \over {6}$$ -
$$3{{1} \over {6}}$$
$$ {32} \over {6}$$ -
$$5{{2} \over {6}}$$
$$ {35} \over {6}$$ -
$$5{{5} \over {6}}$$
$$ {41} \over {6}$$ -
$$6{{5} \over {6}}$$
Exit quiz
6 Questions
