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Clever Corner All grades
Primary 5

Ratio

Writing ratios of two and three amounts, simplifying them, and using them to solve word problems.

8 topics60 episodes22 min in all

Play from the start

Contents

  1. 1 Idea of ratio 9 episodes · 3 min

    What a ratio is, and writing one from pictures, bar models and tables. Topic page ›

    1. 1.1 Cupcakes and doughnuts 0:16
    2. 1.2 Paintbrushes and crayons 0:17
    3. 1.3 A pumpkin and a bag of potatoes 0:19
    4. 1.4 Two strings on a ruler 0:22
    5. 1.5 Boxes of mango and banana muffins 0:19
    6. 1.6 Units in bars M and N 0:22
    7. 1.7 Draw the model for R to T = 7 to 4 0:15
    8. 1.8 Badges in a table 0:20
    9. 1.9 Lina's beads and all the beads 0:21
  2. 2 Equivalent ratios 12 episodes · 5 min

    Equal ratios, and writing a ratio in its simplest form. Topic page ›

    1. 2.1 Circle equal groups, then simplify 0:24
    2. 2.2 Hearts and clouds in boxes of 2 0:29
    3. 2.3 Juice in two cylinders, then two hoses 0:20
    4. 2.4 Six ratios in their simplest form 0:29
    5. 2.5 Drummers and singers, adults and children 0:27
    6. 2.6 Ages in 3 years 0:18
    7. 2.7 Coloured squares on an 8 by 8 grid 0:33
    8. 2.8 Four ratio sentences about vehicles 0:31
    9. 2.9 Missing numbers in equal ratios 0:29
    10. 2.10 More missing numbers in equal ratios 0:36
    11. 2.11 Crackers and cheese cubes in snack packs 0:20
    12. 2.12 Rackets and shuttlecocks in badminton bundles 0:20
  3. 3 Finding a quantity given another quantity and the ratio 4 episodes · 1 min

    Using a ratio and one amount to find the other amount. Topic page ›

    1. 3.1 Marbles shared 3 to 8 0:18
    2. 3.2 Children and adults at a puppet show 0:19
    3. 3.3 Mali's savings 0:18
    4. 3.4 Sandwiches at a class picnic 0:17
  4. 4 Finding a quantity given the total amount and the ratio 4 episodes · 1 min

    Sharing a total in a given ratio. Topic page ›

    1. 4.1 Paying for a birthday cake 0:16
    2. 4.2 A litre of water in two bottles 0:19
    3. 4.3 Sharing $396 in the ratio 5 to 13 0:15
    4. 4.4 A wire cut in the ratio 5 to 4 0:16
  5. 5 Word problems (involving ratios of two quantities) 11 episodes · 4 min

    Word problems with two amounts in a ratio, solved with units and bar models. Topic page ›

    1. 5.1 Gold and silver stickers 0:22
    2. 5.2 Members who train on Saturday mornings 0:16
    3. 5.3 Kenji has $38 more 0:22
    4. 5.4 Wichai has twice as much as both 0:23
    5. 5.5 How much more Arjun got 0:21
    6. 5.6 Napat had $16 less 0:22
    7. 5.7 The uncle's age now 0:23
    8. 5.8 Kofi's mass to both children's 0:15
    9. 5.9 Picture cards and word cards 0:21
    10. 5.10 The longer and the shorter part of a ribbon 0:16
    11. 5.11 The mass of Bag P 0:25
  6. 6 Ratios of three quantities 7 episodes · 3 min

    Ratios of three amounts: writing them, simplifying them and filling in missing numbers. Topic page ›

    1. 6.1 Oranges, mangoes and strawberries 0:19
    2. 6.2 Bars A, B and C 0:20
    3. 6.3 Areas of three rectangles 0:15
    4. 6.4 Shells picked up on a beach walk 0:17
    5. 6.5 Missing numbers in three-term ratios 0:44
    6. 6.6 Two three-term ratios in their simplest form 0:21
    7. 6.7 Equal three-term ratios, blanks on either side 0:38
  7. 7 Word problems (involving ratios of three quantities) 10 episodes · 4 min

    Word problems with three amounts in a ratio, some of which change. Topic page ›

    1. 7.1 Fruit punch, then a bigger jug 0:27
    2. 7.2 The longest piece of wire 0:17
    3. 7.3 Money the 3 boys get in all 0:25
    4. 7.4 Beads left in a jar 0:27
    5. 7.5 Discounts and stamps for every $25 spent 0:19
    6. 7.6 Mrs Arunee, Ken and Fah 0:31
    7. 7.7 A square cut into P, Q and R 0:28
    8. 7.8 Boys at the puppet show 0:20
    9. 7.9 Grandma Malee's money 0:17
    10. 7.10 Omar's money, then after he spends $14 0:25
  8. 8 Thinking questions 3 episodes · 1 min

    Puzzles: a rectangle split in a ratio, one part of a cut rectangle, and two shelves with the same ratio. Topic page ›

    1. 8.1 A rectangle split in the ratio 4 to 5 to 9 0:29
    2. 8.2 The area of Q in a cut rectangle 0:26
    3. 8.3 Two shelves with the same ratio 0:22