Multiply 1-digit numbers by decimal fractions using written methods
I can explain how to multiply 1-digit numbers by decimal fractions using written methods.
Multiply 1-digit numbers by decimal fractions using written methods
I can explain how to multiply 1-digit numbers by decimal fractions using written methods.
Lesson details
Key learning points
- Use scaling to convert the decimal fraction to a whole number then multiply; use scaling to adjust the product.
- If using short multiplication with decimal fractions, align the decimal point in the decimal fraction and product.
Keywords
Estimation - When we estimate, we find a value that is close enough to the right answer, usually with some thought or calculation involved.
Scaling - Scaling is when a given quantity is made ___ times the size. It can be used to adjust the size of a factor. In this lesson, scaling will involve making values 10 or 100 times the size.
Common misconception
The short multiplication algorithm may not be correctly aligned.
Check that the decimal point aligns in the decimal fraction and the product. Scaffolding with place value columns may support further.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
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1.3
10.3
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