Question

example
there are 127 crayons in a bin. what is 127 rounded to the nearest hundred?
in the drawing, you can see that 127 is 1 hundred + 2 tens + 7 ones.
the number 127 is between 100 and 200. the halfway number between 100 and 200 is 150. the number 127 is less than the halfway number.
that means 127 is closer to 100 than to 200.
so, 127 rounded to the nearest hundred is 100.
1 the number 684 is between which two hundreds? circle the two hundreds on the number line.
←|———|———|———|———|———|→
200 300 400 500 600 700
2 what is the halfway number between the two hundreds you circled? ____
3 what is 684 rounded to the nearest hundred? ____
4 what is 694 rounded to the nearest hundred? ____
5 what is 674 rounded to the nearest hundred? ____
6 what is 624 rounded to the nearest hundred? ____

Explanation:

Step1: Identify the two - hundreds for 684

684 is between 600 and 700.

Step2: Calculate the halfway number

The halfway number between 600 and 700 is $\frac{600 + 700}{2}=650$.

Step3: Round 684

Since 684>650, 684 rounded to the nearest hundred is 700.

Step4: Round 694

694>650, so 694 rounded to the nearest hundred is 700.

Step5: Round 674

674>650, so 674 rounded to the nearest hundred is 700.

Step6: Round 624

624<650, so 624 rounded to the nearest hundred is 600.

Answer:

1. 600 and 700
2. 650
3. 700
4. 700
5. 700
6. 600