There are 366 different Starters of The Day, many to choose from. You will find in the left column below some starters on the topic of Ratio. In the right column below are links to related online activities, videos and teacher resources.

A lesson starter does not have to be on the same topic as the main part of the lesson or the topic of the previous lesson. It is often very useful to revise or explore other concepts by using a starter based on a totally different area of Mathematics.

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### Ratio Starters:

Aunty Dotty: A real life situation requiring the division an amount of money according to a given ratio.

Missing Square Puzzle: The missing square puzzle is an optical illusion used to help students reason about geometrical figures.

Plant More Trees: If six girls can plant 90 trees in a day. How many trees can ten girls plant in a day? The unitary method.

What are they?: A starter about sums, products, differences, ratios, square and prime numbers.

How Many Left Handers?: Work out the number of members if the probability of left-handed members being randomly selected is given.

Hundred and Fifty Percent: Divide 110 into two parts so that the larger part is 150% of the smaller part.

Paper Ratio: Calculate the ratio of the sides of an A4 sheet of paper without any measuring.

Paper Surprising Perimeter: Find the perimeter of a folded sheet of A4 paper as described in this short video.

Sibling Count: How many boys and how many girls are there in the family?

Temperature Sum: Can you explain why 0oC + 0oC does not equal 64oF

Three Right Triangles: Calculate the lengths of the unlabelled sides of these right-angled triangles.

Two real numbers: The sum of the reciprocals of two real numbers is -1, and the sum of their cubes is 4. What are they?

#### Ratio

A self marking exercise on using ratio notation, reducing a ratio to its simplest form and dividing a given quantity into a number of parts in proportion to a given ratio.

Transum.org/go/?to=ratio

### Curriculum for Ratio:

#### Year 5

Pupils should be taught to solve problems involving multiplication and division, including scaling by simple fractions and problems involving simple rates more...

#### Year 6

Pupils should be taught to solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts more...

Pupils should be taught to solve problems involving similar shapes where the scale factor is known or can be found more...

Pupils should be taught to solve problems involving unequal sharing and grouping using knowledge of fractions and multiples. more...

#### Years 7 to 9

Pupils should be taught to use scale factors, scale diagrams and maps more...

Pupils should be taught to draw and measure line segments and angles in geometric figures, including interpreting scale drawings more...

Pupils should be taught to use ratio notation, including reduction to simplest form more...

Pupils should be taught to divide a given quantity into two parts in a given part:part or part:whole ratio; express the division of a quantity into two parts as a ratio more...

Pupils should be taught to understand that a multiplicative relationship between two quantities can be expressed as a ratio or a fraction more...

Pupils should be taught to relate the language of ratios and the associated calculations to the arithmetic of fractions and to linear functions more...

Pupils should be taught to solve problems involving direct and inverse proportion, including graphical and algebraic representations more...

#### Years 10 and 11

Pupils should be taught to compare lengths, areas and volumes using ratio notation and/or scale factors; make links to similarity (including trigonometric ratios) more...

Pupils should be taught to understand that X is inversely proportional to Y is equivalent to X is proportional to 1/Y ; {construct and} interpret equations that describe direct and inverse proportion more...

Pupils should be taught to interpret the gradient of a straight line graph as a rate of change; recognise and interpret graphs that illustrate direct and inverse proportion more...

Pupils should be taught to identify and work with fractions in ratio problems more...

Pupils should be taught to apply the concepts of congruence and similarity, including the relationships between lengths, {areas and volumes} in similar figures more...

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### Notes:

A ratio is a relationship between two numbers of the same kind. In layman's terms a ratio represents, simply, for every amount of one thing, how much there is of another thing.

This topic presents a number if different ways pupils can represent ratios and apply their meaning to problem solving situations.

### Ratio Teacher Resources:

Dividing in a Ratio: A slide presentation showing how to divide a quantity in a given ratio

### Ratio Activities:

Ratio: A self marking exercise on using ratio notation, reducing a ratio to its simplest form and dividing a given quantity into a number of parts in proportion to a given ratio.

Ratios vs Fractions: Relate the language of ratios and the associated calculations to the arithmetic of fractions.

Scale Drawings: Measure line segments and angles in geometric figures, including interpreting scale drawings.

Algebra In Action: Real life problems adapted from an old Mathematics textbook which can be solved using algebra.

Recipe Ratios: Learn the mathematics required to adapt recipes to serve a different number of people.

Pattern Clues: An interactive activity challenging you to reproduce a pattern of coloured squares according to given clues.

Unitary Method: Ten questions which can be solved using the unitary method.

Unit Pricing: Calculate the unit cost of items to earn jigsaw pieces that make a joke.

Map Scales: Test your understanding of map scales expressed as ratios with this self marking quiz.

Ratio Clues: Arrange the ratio clues in the clouds in a logical order to work out the values of the twelve letters.

Similar Shapes: Questions about the scale factors of lengths, areas and volumes of similar shapes.

Direct and Inverse Proportion: A self-marking exercise in solving direct and inverse variation problems.

Finally there is Topic Test, a set of 10 randomly chosen, multiple choice questions suggested by people from around the world.

Alternatively, for the more advanced student, there is an ever-growing collection of Exam-Style Questions with worked solutions on the topic of Ratio.

### Ratio Videos:

Transum's Ratio Video

Ratio Video: Learn to work with ratios including dividing a quantity in a given ratio.

Ratios And Rates: A lively explanation from Math Antics

Map Scales Video: Refresh your understanding of map scales expressed as ratios.

Scale Factors Video: The scale factor, area factor and volume factor of similar shapes are quite different.

Direct and Inverse Proportion Song: Examples showing how to solve direct and inverse proportion questions in the form of a song!

Links to other websites containing resources for Ratio are provided for those logged into 'Transum Mathematics'. Subscribing also opens up the opportunity for you to add your own links to this panel. You can sign up using one of the buttons below:

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### Other

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#### Direct and Inverse Proportion

A self-marking exercise in solving direct and inverse variation problems.

Transum.org/go/?to=proportion

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Wednesday, November 1, 2017

Shyrell,

Monday, January 18, 2021

"Thank you so much for the beautiful and interactive activities here in your site its a great help for me in my discussion and my students love it so much . <3
God bless."

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