Expressing one number as a fraction of another
I can express one number as a fraction of another.
Expressing one number as a fraction of another
I can express one number as a fraction of another.
Slide deck
Lesson details
Key learning points
- There exists a multiplier for any pair of values.
- The multiplier is more than just a scaling factor.
- The multiplier also expresses one number as a fraction of the other.
Common misconception
Only see the amount, not proportion. E.g £30 from £100 is no different to £30 from £60.
Referring to the whole using bar models or fractions can emphasise the amount with respect to the whole.
Keywords
Reciprocal - The reciprocal is the multiplicative inverse of any non-zero number. Any non-zero number multiplied by its reciprocal is equal to 1.
Terminating decimal - A terminating decimal is one that has a finite number of digits after the decimal point.. E.g. 92.2, 193.3894, non-example: $$1.\dot9$$.
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).
Video
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Worksheet
Starter quiz
6 Questions
3 -
$$1\over3$$
$$5\over2$$ -
$$2\over5$$
1.25 -
$$4\over5$$
$$5\over20$$ -
4
$$3 {1\over2}$$ -
$$2\over7$$
Exit quiz
6 Questions
6 × $$\square$$ = 4 -
$$2\over3$$
6 × $$\square$$ = 10 -
$$1 {{2} \over {3}}$$
$$\square$$ × 6 = $$3\over2$$ -
$$1\over4$$
6 × $$\square$$ = 15 -
2.5
$$\square$$ × 6 = $$18\over7$$ -
$$3\over7$$
112 is $$\square$$ of 392 -
$$2\over7$$
$$\square$$ of 445 is 178 -
$$2\over5$$
261 is $$\square$$ of 609 -
$$3\over7$$
$$\square$$ of 315 is 420 -
$$4\over3$$
1524 is $$\square$$ of 2032 -
$$3\over4$$