Numbers & the number system

Negative numbers

Name: ______________________________Date: ______________Score: ______ / 20

1.
How do we say the number −6?
1. Anegative six
2. Bsix
3. Cminus sixty
2.
The temperature in a town was 5 °C. It dropped by 9 °C overnight. What was the lowest night-time temperature?
°C
3.
What temperature is 6 degrees warmer than −4 °C?
°C
4.
What temperature is 3 degrees cooler than 0 °C?
°C
5.
Marcus says, '−5 °C is warmer than −4 °C because 5 is bigger than 4.' Is Marcus correct?
True False
6.
What temperature is 5° warmer than −1 °C?
°C
7.
Put these temperatures in order, starting with the coldest.
Write the order (coldest first) in the boxes:
- ?3 °C
- ?−6 °C
- ?−2 °C
8.
−2 is greater than −5.
True False
9.
Start at 11 °C and jump back 15 degrees. What temperature do you reach?
°C
10.
Count back in tens: 30, 20, 10, 0, ... What number comes after 0?
11.
Put these temperatures in order, starting with the coldest.
Write the order (coldest first) in the boxes:
- ?1 °C
- ?−8 °C
- ?−3 °C
12.
Count back through zero: −1, −2, −3, ... What comes next?
1. A−4
2. B0
3. C4
13.
Which is the coldest: −10 °C, −20 °C or −5 °C?
1. A−5 °C
2. B−20 °C
3. C−10 °C
14.
What temperature is 9 degrees warmer than −5 °C?
°C
15.
What temperature is 8 degrees warmer than −7 °C?
°C
16.
What temperature is 9° warmer than −6 °C?
°C
17.
Start at 67 °C and jump back 25 degrees. What temperature do you reach?
°C
18.
The temperature in a town was 9 °C. It dropped by 2 °C overnight. What was the lowest night-time temperature?
°C
19.
What temperature is 2 degrees less than 8 °C?
°C
20.
What temperature is 6 degrees higher than −4 °C?
°C

Answer key

Numbers & the number system — Negative numbers

1.A. negative six
2.-4 °C
3.2 °C
4.-3 °C
5.False
6.4 °C
7.−6 °C, −2 °C, 3 °C
8.True
9.-4 °C
10.-10
11.−8 °C, −3 °C, 1 °C
12.A. −4
13.B. −20 °C
14.4 °C
15.1 °C
16.3 °C
17.42 °C
18.7 °C
19.6 °C
20.2 °C