# Rounding and negative numbers

> Grade 4: round to the nearest 10, 100 and 1000, estimate answers, count back through zero, negative temperatures, Roman numerals to 100.

Source: https://olyclass.com/library/math-g4-negative-rounding-en/

- Subject: Math
- Level: Grade 4
- Practice: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=math-g4-negative-rounding-en
- Copy and edit it: https://olyclass.com/library?copy=math-g4-negative-rounding-en
- Games it plays well in: [Hoop Shot](https://olyclass.com/classroom-games/hoop-shot/), [Penalty Kick](https://olyclass.com/classroom-games/penalty-kick/), [Fishing Pond](https://olyclass.com/classroom-games/fishing-pond/), [Claw Machine](https://olyclass.com/classroom-games/claw-machine/)

## Questions

1. What is 63 rounded to the nearest 10? (50 / 60 / 65 / 70)
   Answer: 60
2. What is 450 rounded to the nearest 100? (400 / 450 / 500 / 550)
   Answer: 500
3. What is 3,640 rounded to the nearest 1000? (3000 / 3600 / 3700 / 4000)
   Answer: 4000
4. What is 1,284 rounded to the nearest 100? (1000 / 1200 / 1280 / 1300)
   Answer: 1300
5. To estimate 48 + 31, which sum of rounded numbers is best? (40 + 30 / 40 + 40 / 50 + 30 / 50 + 40)
   Answer: 50 + 30
6. Round 318 and 487 to the nearest 100, then add. What is the total? (600 / 700 / 800 / 900)
   Answer: 800
7. Count back: 3, 2, 1, 0, … What number comes next? (-1 / -3 / 0 / 1)
   Answer: -1
8. The temperature is 2°C and falls by 5 degrees. What is it now? (-2°C / -3°C / -7°C / 3°C)
   Answer: -3°C
9. Which temperature is the coldest? (-2°C / -5°C / -8°C / 0°C)
   Answer: -8°C
10. Which Roman numeral means 40? (LX / LXX / XC / XL)
   Answer: XL
11. -4 is greater than -1.
   Answer: False
12. 3,500 rounded to the nearest 1000 is 4000.
   Answer: True
13. The Roman numeral XIV stands for 14.
   Answer: True
14. What is 7,951 rounded to the nearest 1000?
   Answer: 8000
15. Start at 4 and count back 6. Which number do you reach?
   Answer: -2
16. Write 94 in Roman numerals.
   Answer: XCIV