Proportion: Scaling Recipes Up and Down
A pancake recipe for 4 people uses 200 g flour, 2 eggs and 300 ml milk. Bruno the bear needs enough for 6, so he finds the amount for 2 people first (halve it), then multiplies by 3. Then scale a recipe for 6 down to 4 yourself, and learn the "find one first" method.
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1:58Sharing in a Ratio
Pip the panda and Rosie the rabbit share 20 strawberries in the ratio 2 : 3. A bar model shows the three steps: add the parts, find one part, multiply. Then share £35 in the ratio 3 : 4 and check that the answers add back up.
1:58Map Scales and Scale Factors
On Leo the lion’s map, 1 cm stands for 2 km. Learn to use a map scale to turn a 6 cm measurement into a real distance of 12 km, and see how a scale factor makes every length of a shape bigger by the same amount. Then work out a real distance with a scale of 1 cm to 5 km yourself.
1:47Number Sequences: Finding the Rule
Hopper the frog hops along lily pads numbered 3, 7, 11, 15 to find the rule (+4) and the next number. Then try a sequence that goes down, see one that doubles, and learn to check the gaps between numbers first.