Remember: Zero is where we start. Below zero is negative. Above zero is positive.
Positive, negative and zero
1
The freezer is 6 degrees below zero. What number tells that?
2
Count the steps from zero. What number is the dot at?
3
Read the number line. What number is the dot at?
4
A submarine is 40 meters below sea level. Which number tells that?
400−40
5
A balloon is 40 meters above the ground. What does zero mean here?
The ground, the starting heightNo height at allThe lowest place there is
6
A temperature of −10 degrees is warmer than 0 degrees.
TrueFalse
7
Join each to its number.
13 floors below the lobby
23 floors above the lobby
3a loss of 7 points
4a gain of 7 points
A3
B−7
C7
D−3
Use the number line
8
Two dots are on the number line. Which pair of numbers are they at?
−5 and 22 and −5−2 and 5
9
Number the places from the lowest (1) to the highest (4).
the ground
a cave 30 meters below the ground
a treetop 20 meters above the ground
a basement 8 meters below the ground
10
What number is the dot at? Each step is 10.
11
Omar owes 30 dollars. What does zero mean here?
Owing a lotNo money and no debtThe least money you can have
12
On this number line, the dot is to the left of zero, so it shows a negative number.
TrueFalse
13
The dot is a hiker in a canyon. How many steps up does the hiker go to reach zero, the trail head?
14
Write about a time when a number below zero is used (a thermometer, an elevator or a bank). Say what zero means in your story.
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