Rounding and Addition/Subtraction

Front

What is rounding?

Back

Rounding is changing a number to a nearby value that is easier to work with, usually to the nearest ten, hundred, or thousand.

Front

What does it mean to round 744 to the nearest ten?

Back

When rounding 744 to the nearest ten, you look at the digit in the ones place (4). Since it is less than 5, you round down to 740.

Front

What is the sum of 7,171 and 6,321 when rounded to the nearest thousand?

Back

When rounded, 7,171 becomes 7,000 and 6,321 becomes 6,000. Their sum is approximately 13,000.

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another.

Front

What is the result of 745 + 611 when rounded to the nearest hundred?

Back

745 rounds to 700 and 611 rounds to 600. Their sum is approximately 1,300.

Front

How do you round the number 74?

Back

74 rounds to 70 because the digit in the ones place (4) is less than 5.

Front

What operation do you use to find the total number of items?

Back

You use addition to find the total number of items.

Front

What is the nearest ten to 750?

Back

The nearest ten to 750 is 750 itself.

Front

If you have 80 balloons and you give away 30, how many do you have left?

Back

You have 50 balloons left (80 - 30 = 50).

Front

What is the nearest hundred to 1,356?

Back

The nearest hundred to 1,356 is 1,400.