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Ratio + proportion topics for elementary kids

Below are the elementary topics available for the category "Ratio + proportion" at Free Math Games.

These free math topics with audio offer a complete set of basic Ratio + proportion topics for elementary pupils (Kindergarten to 5th grade, ages 5 to 11). The Ratio + proportion category is divided into sub-categories such as " Relative sizes", " Percent: no calculator", " Percent: with calculator", etc. Each sub-category has multiple topics with between 6 and 10 question and answer pairs for the lessons, plus additional question answer pairs for the games and tests.

For each question/answer pair in a topic you get the question as picture, equation or text, the spoken question read by a robot, and an answer as both number or text and as audio. For most topics there are also 3 wrong answers prepared for each question.

5th grade (19 topics)

Ratio + proportion ➔ Relative sizes

2 x
Double the size
Use multiplication and division to get double the size of the objects or values
3 x
Triple the size
Use multiplication and division to find triple the given values and measures
5 x
Five times the size
Use multiplication and division to find five times the given sizes
½ x
Half the size
Use multiplication and division to find half of the given quantities and measures
⅓ x
A third of the size
Use multiplication and division to find a third of the size of the given values and measures
⅕ x
A fifth of the size
Use multiplication and division to find a fifth of the given values and measures
0.1 = 20g
Total size from decimal portion
Use multiplication and division to calculate the whole value or measure from the given decimal portion
Relative size: find scale factor
Use multiplication and division to find the scale factor given original and final sizes

Ratio + proportion ➔ Percent: no calculator

10%
Find 10%
From 100% find out what 10% is using division (without using your calculator)
30%
Find 30%
Find 30% by breaking up each given value into 3 lots of 10% (no calculator)
15%
Find 15%
Find 15% by breaking up each given value into a 10% and a 5% and adding them together

Ratio + proportion ➔ Percent: with calculator

15%
Find 15% with calculator
Find 15% with your calculator using the multiplier 0.15
8%
Find 8% with calculator
Find 8% with your calculator using the multiplier 0.08
80%
Find 80% with calculator
Find 80% with your calculator using the multiplier 0.8

Ratio + proportion ➔ Express as a percentage

20 / 50 =
40%
Express 2 values as a percentage
Express 2 values as a percentage by creating a fraction from the 2 numbers and multiplying by 100

Ratio + proportion ➔ Compare proportions

⅕ 0.2 20%
Compare fractions, decimals, percent
Compare proportions using fractions, decimals and percent and say which is the biggest part of the whole
25% x 5 cm
Percentages of different measures
Identify which percentage of a length is the longest

Ratio + proportion ➔ Similar shape problems

Scale factors: calculate dimensions
Use the scale factor and model or drawing dimensions to calculate the real dimensions
Similar shapes: find scale factor
Use the properties of similar shapes to find the scale factor

In addition to the Ratio + proportion topics shown above, the elementary section of Free Math Games has 17 other top level categories of topics to choose from. Each top level category offers a full breadth of topics to cover the elementary curriculum. Use these topics to reinforce key math concepts in a fun and engaging way that will keep your pupils enthused and energised with the math they are learning. The top level categories available are:

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