Idea 13of 22Builds onOne big number
Pictures sized honestly
How can a picture make a number look bigger than it is?
Today you'll discover
- what happens when a picture grows both ways
- how much bigger it looks
- the honest way to draw it
Think firstLunch garbage: 120 bags, then 60
September's bag is drawn twice as tall and twice as wide. How much bigger does it look?
Decide first, then press Next. Count how many small pictures fit inside the big one.
A small garbage bag labelled October: 60 beside a big bag labelled September: 120, drawn twice as tall and twice as wide. Then 4 small bags fill the big one. Then rows of same-size bag icons: 12 for September, 6 for October. The last step shows trees: 15 last year beside a tree 3 times as tall and wide for 45.
See the whole ideathe big idea and the key word, in one place
The big idea
Grow a picture both ways and it looks far bigger; same-size icons stay honest.
Compare themOne bag grown 2 times each way looks 4 times as big. Two rows of same-size bags, 12 and 6, look exactly 2 times.
Easy to get wrongEvery number can be true and the picture still mislead. Check pictures as carefully as the numbers.
Key word
- area
- how much flat space a shape covers; twice as tall and twice as wide is 4 times the area
Ready to use it?
- Spot a picture that makes a change look too big.
- Say how much bigger a grown picture looks.