Numbers and place value · Ages 10–11
Negative numbers around us worksheet
Part of: Negative numbers
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Negative numbers around us worksheet
Numbers and place value · Ages 10–11
Numsprite
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Name:Date:Score:／48
Write each answer in the space. For word problems, show your working and write a sentence answer.
Part A: Choose, or true or false (2 marks each)
1.Taking sea level as 0 m, a place at a height of 45 m is below sea level.
True or false?
Answer:
2.What temperature does the thermometer show?
- A. −6°C
- B. −5°C
- C. 5°C
- D. −4°C
Choose the right answer
Answer:
3.What number is the arrow pointing to on the number line?
- A. 0
- B. 1
- C. −2
- D. −1
Choose the right answer
Answer:
4.Taking sea level as 0 m, a place at a height of −20 m is below sea level.
True or false?
Answer:
5.Taking sea level as 0 m, a place at a height of −45 m is below sea level.
True or false?
Answer:
6.In a lift, the ground floor G is like 0. Going up are floors 1, 2, …; going down are B1, B2, …. Which number stands for B5?
- A. −6
- B. −5
- C. −4
- D. 5
Choose the right answer
Answer:
7.Which thermometer shows −10°C?
- A
- B
- C
- D
Choose the right picture
Answer:
8.Which thermometer shows −8°C?
- A
- B
- C
- D
Choose the right picture
Answer:
9.In a lift, the ground floor G is like 0. Going up are floors 1, 2, …; going down are B1, B2, …. Which number stands for B3?
- A. −3
- B. 3
- C. −4
- D. −2
Choose the right answer
Answer:
10.Which thermometer shows −4°C?
- A
- B
- C
- D
Choose the right picture
Answer:
11.In a lift, the ground floor G is like 0. Going up are floors 1, 2, …; going down are B1, B2, …. Which number stands for B2?
- A. −1
- B. 2
- C. −3
- D. −2
Choose the right answer
Answer:
12.The number line has a number every 5 marks. What number is the arrow pointing to?
- A. −2
- B. 2
- C. −3
- D. −8
Choose the right answer
Answer:
Part B: Word problems (4 marks each)
13.A building's lift buttons, top to bottom, are 13, …, 2, 1, G, B1, …, B2. How many buttons are there?
Working:
Answer:
14.Taking sea level as 0 m, a diver is 26 m below sea level and a seagull 21 m above it. Which number gives the diver's position?
- A. 26 m
- B. −26 m
- C. 21 m
- D. −21 m
Choose the right answer
Working:
Answer:
15.A freezer is at 21 degrees below zero, written in numbers as −21°C.
True or false?
Working:
Answer:
16.Tsz-ching's Octopus card can go below zero. After a tap, its balance shows −8 dollars. What does that mean?
- A. The card still has 8 dollars to spend
- B. The card's money is used up exactly
- C. The card owes 8 dollars, paid back at the next top-up
- D. After adding 8 dollars, the card holds 8 dollars
Choose the right answer
Working:
Answer:
17.A building's lift buttons, top to bottom, are 13, …, 2, 1, G, B1, …, B3. How many buttons are there?
Working:
Answer:
18.A freezer is at 20 degrees below zero, written in numbers as −20°C.
True or false?
Working:
Answer:
Show the answers and working
Negative numbers around us worksheet: Answers and working
Part A: Choose, or true or false
1. False
Sea level is 0 m. Check whether 45 is more or less than 0.
Heights less than 0 (negative) are below sea level, and those more than 0 are above it: see whether 45 has a minus sign.
2. B. −5°C
Find the 0°C mark first, then count how many marks below it the top of the liquid is.
The top of the liquid is 5 marks below 0°C, 1 degree a mark: 5 degrees below zero, which is −5°C.
3. D. −1
Find 0 first. Which side of 0 is the arrow on, and how many steps away is it?
The arrow is 1 steps left of 0, so the number is negative: −1.
4. True
Sea level is 0 m. Check whether −20 is more or less than 0.
Heights less than 0 (negative) are below sea level, and those more than 0 are above it: see whether −20 has a minus sign.
5. True
Sea level is 0 m. Check whether −45 is more or less than 0.
Heights less than 0 (negative) are below sea level, and those more than 0 are above it: see whether −45 has a minus sign.
6. B. −5
G is 0. B5 is below ground, so it is negative. How many floors below G is it?
B5 is the 5th floor below ground, 5 below 0: −5.
7. A
−10 has a minus sign, so it is below 0°C. Find 0°C on each thermometer, then count the marks down to the top of the liquid.
−10°C is 10 degrees below zero: the top of the liquid is 10 marks below 0°C.
8. D
−8 has a minus sign, so it is below 0°C. Find 0°C on each thermometer, then count the marks down to the top of the liquid.
−8°C is 8 degrees below zero: the top of the liquid is 8 marks below 0°C.
9. A. −3
G is 0. B3 is below ground, so it is negative. How many floors below G is it?
B3 is the 3rd floor below ground, 3 below 0: −3.
10. D
−4 has a minus sign, so it is below 0°C. Find 0°C on each thermometer, then count the marks down to the top of the liquid.
−4°C is 4 degrees below zero: the top of the liquid is 4 marks below 0°C.
11. D. −2
G is 0. B2 is below ground, so it is negative. How many floors below G is it?
B2 is the 2nd floor below ground, 2 below 0: −2.
12. A. −2
The nearest numbered mark to the left of the arrow is −5. How many steps right from −5 is the arrow?
The arrow is to the right of −5, by 3: counting on 3 from −5 gives −2.
Part B: Word problems
Marking: 2 for the working, 1 for the answer, 1 for the sentence.
13. 16 buttons
Count in three parts: floors 1 to 13, G, and B1 to B2. Don't leave out G.
Floors 1 to 13 give 13, G (like 0) gives 1, and B1 to B2 give 2: 13 + 1 + 2 = 16.
14. B. −26 m
Sea level is 0 m. The diver is below it: is that a positive or a negative number?
Below sea level is negative: 26 m below is written −26 m.
15. True
A temperature below zero needs a minus sign. Check whether −21 has one, and whether the number is 21.
A temperature below zero takes a minus sign: 21 degrees below zero is −21°C.
16. C. The card owes 8 dollars, paid back at the next top-up
How much less than 0 is −8? Think about what a balance below 0 dollars means.
−8 dollars is 8 less than 0: the card owes 8 dollars.
17. 17 buttons
Count in three parts: floors 1 to 13, G, and B1 to B3. Don't leave out G.
Floors 1 to 13 give 13, G (like 0) gives 1, and B1 to B3 give 3: 13 + 1 + 3 = 17.
18. True
A temperature below zero needs a minus sign. Check whether −20 has one, and whether the number is 20.
A temperature below zero takes a minus sign: 20 degrees below zero is −20°C.
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