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Maths · Grade 6 · Set B
Below Zero in Real Places
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B
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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.
  1. 13 floors below the lobby
  2. 23 floors above the lobby
  3. 3a loss of 7 points
  4. 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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Answer key · Set B
Below Zero in Real Places
1-6 Below zero is negative, so 6 degrees below zero is −6.
2-3 Start at zero and count left: 1, 2, 3. Left of zero is negative.
35 Start at zero and count right 5 steps. Right of zero is positive.
4−40 Below sea level is negative, so it is −40.
5The ground, the starting height Zero is where we start counting. Here it is the ground.
6False −10 is 10 steps below zero, so it is colder than 0.
71-D, 2-A, 3-B, 4-C Below, losing and owing are negative. Above and gaining are positive.
8−2 and 5 The left dot is 2 steps left of zero: −2. The right dot is 5 steps right of zero: 5.
93, 1, 4, 2 Below the ground is lower than the ground, and the farther below, the lower.
10-40 Count back from zero in tens: −10, −20, −30, −40.
11No money and no debt Zero is the starting point: nothing owed and nothing saved.
12True Numbers to the left of zero are negative.
139 The hiker is 9 steps below zero, so it takes 9 steps up to reach zero.
14Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.