15062021 Ratio MATHSWATCH CLIP 38 106 107 GRADE

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 L. O. To be able to § Simplify a ratio and identify equivalent ratios § Share amounts in a given ratio Key Words divide, share, proportion, simplify, equivalent, quantity, parts Starter: Year 10 this powerpoint has examples you can follow and work through to support you when completing worksheets. You can email me on wbevis@yphub. org and I will contact you if you need support.

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 SIMPLIFYING RATIOS

6/15/2021 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio A ratio compares the sizes of parts or quantities to each other. red : blue =9: 3 blue : red =3: 9 =3: 1 =1: 3 red : yellow : blue = 12 : 4 : 8 = 3 : 1 : 2

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 BASIC RATIO! On your mini whiteboards… Quick Quiz!

Ratio 15/06/2021 The ratio of circles to triangles 6: 4 4: 6 5: 4 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 The ratio of squares to circles 5: 3 3: 4 4: 3

Ratio 15/06/2021 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 The ratio of circles to diamonds 5: 7 5: 8 5: 9

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 The ratio of triangles to bolts 7: 3 3: 7 3 to 7

Ratio 15/06/2021 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 The ratio of squares to diamonds 9: 8 8 to 9 9 to 8

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 The ratio of circles to triangles 8 o t 10 9: 8 8 : 0 1

15/06/2021 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio The ratio of bolts to hearts 26: 9 25: 9 24: 9

Ratio 15/06/2021 State the following ratios for the diagram above. Red: Green = 8: 3 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 15 parts 8 red squares for every 3 green squares. Yellow: White = 3: 1 3 yellow squares for every 1 white square. Green: Yellow = 3: 3 3 green squares for every 3 yellow squares. White: Red = 1: 8 1 white square for every 8 red squares. Red: White = 8: 1 8 red squares for every 1 white square.

Ratio 15/06/2021 State the following ratios for the toys in the box. Dogs: Teddies = Clowns: Ducks = Soldiers: Clowns = Ducks: Teddies = Dogs: Clowns = 6: 4 3: 2 1: 3 2: 4 6: 3 6 dogs for every 4 teddies. 3 clowns for every 2 ducks. 1 soldier for every 3 clowns. 2 ducks for every 4 teddies. 6 dogs for every 3 clowns. MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 16 parts

Ratio 15/06/2021 Write the following ratios in simplest form. Hearts: Clubs = 12: 6 = 2: 1 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 24 parts

Ratio 15/06/2021 Write the following ratios in simplest form. Spades: Clubs = 2: 6 = 1: 3 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 24 parts

Ratio 15/06/2021 Write the following ratios in simplest form. Clubs: Diamonds = 6: 4 = 3: 2 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 24 parts

MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio 15/06/2021 Ratios can be simplified like fractions by dividing each part by the highest common factor. For example, 21 : 35 ÷ 7 =3: 5 ÷ 7 For a three-part ratio all three parts must be divided by the same number. For example, 6 : 12 : 9 ÷ 3 =2: 4: 3 ÷ 3

MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio 15/06/2021 When a ratio is expressed in different units, we must write the ratio in the same units before simplifying. Simplify the ratio 90 p : £ 3 First, write the ratio using the same units. 90 p : 300 p When the units are the same we don’t need to write them in the ratio. 90 : 300 ÷ 30 = 3 : 10 ÷ 30

15/06/2021 Ratio MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 SIMPLIFYING RATIOS § Find a common factor of all the numbers in the ratio § Divide all numbers in the ratio by this common factor § Check for other common factors – if there any, repeat! § Once there are no more common factors, your ratio is in its simplest form § HINT! If you can find the HIGHEST common factor (HCF) at the start, you will be done after one division!

MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio 15/06/2021 Write these ratios in their simplest form 6: 8 12: 8 6: 9 12: 6 by 2 by 4 by 3 by 6 3: 4 3: 2 2: 3 2: 1 8: 8 5: 20 12: 18 45: 54 by 8 by 5 by 6 by 9 1: 1 1: 4 2: 3 5: 6

MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Ratio 15/06/2021 Task 1) 4: 8 1: 2 2) 8 : 12 2: 3 3) 4 : 12 1: 3 4) 6: 9 2: 3 5) 10 : 20 1: 2 6) 8 : 10 4: 5 7) 2: 8 1: 4 8) 14 : 6 7: 3 9) 30 : 20 3: 2 10) 7 : 21 1: 3 11) 8 : 22 4 : 11 12) 9: 6 3: 2 13) 2000 g : 1 Kg 2: 1 14) 50 mm : 2 cm 5: 2 15) 4000 ml : 6 litres 2: 3 16) 3 Km : 12000 m 1: 4 17) 40 g : 80000 mg 1: 2 18) 6 tonnes : 8000 Kg 3: 4 19) 180 secs : 2 mins 3: 2 20) 3 mins : 200 secs 9 : 10 21) 3 hours : 120 mins 3: 2 22) 1 hour 15 mins : 2 hours 5 : 8 23) 4 hours : 2 hours 20 mins 12 : 7 24) 2: 1 2 hours 10 mins : 1 hour 5 mins

Ratio 15/06/2021 MATHSWATCH CLIP 38, 106, 107 GRADE 2, 3 Try these Simplify the ratio 0. 6 m : 30 cm : 450 mm =4: 2: 3 Simplify the ratio 0. 8 : 2 =2: 5 Simplify the ratio 2 3 : 4 =1: 6