Positive and negative numbers. The coordinate line
Answers are for parents and teachers.
1
Write as numbers: 25 m above sea level; 40 m below sea level.
+25 and −40
2
From −12, 7, 0, 3/4, −1 list the integers.
−12, 7, 0, −1
3
Find the distance between A(−7) and B(5).
12
4
Find the midpoint of −8 and 4.
-2
5
Draw a number line from −5 to 5 and mark −3, 0 and 4. Which is closest to the origin?
0, because it is the origin itself.