Idea 4of 13Builds onA zero puts it on an axis
Read the scale first
What if each grid line is worth more than 1?
Today you'll discover
- how to read a grid that counts by 5s
- why big numbers need a bigger scale
- how to avoid counting lines
Think firstThis grid counts by 5s
P is 7 lines across and 6 lines up. What are its coordinates?
Decide first, then press Next. Read the numbers along the axes before you count.
A coordinate grid whose axes are numbered by 5s, 0 to 75. Three points, P, Q and R. One at a time their coordinates are written beside the grid: P (35, 30), Q (10, 55), R (60, 15).
See the whole ideathe big idea and the key word, in one place
The big idea
Read the scale before you count: each grid line may be worth 2, 5 or 10.
Choosing a scalePoints up to 60 do not fit on a grid counting by 1s to 15. Count by 5s and they do.
Easy to get wrongCheck both axes. The bottom and the side can count by different amounts.
Key word
- scale
- what each line on a grid counts by: 1s, 2s, 5s or 10s
Ready to use it?
- Read coordinates on grids that count by 2s, 5s or 10s.
- Plot points on a grid with a scale.