2.NBT.8 Adding and Subtracting 10 and 100

Front

What does it mean to add 10 or 100 to a number?

Back

Adding 10 or 100 to a number increases its value by that amount. For example, adding 10 to 226 results in 236, and adding 100 to 226 results in 326.

Front

How do you subtract 10 from a number?

Back

To subtract 10 from a number, you decrease its value by 10. For example, 35 - 10 equals 25.

Front

What is the result of adding 100 to 887?

Back

Adding 100 to 887 results in 987.

Front

What is the result of subtracting 10 from 109?

Back

Subtracting 10 from 109 results in 99.

Front

How do you find 10 more than a given number?

Back

To find 10 more than a given number, simply add 10 to that number. For example, 10 more than 443 is 453.

Front

What is the relationship between adding and subtracting 10 and 100?

Back

Adding and subtracting 10 and 100 are inverse operations. Adding increases the number, while subtracting decreases it.

Front

What is the pattern when adding 10 to a two-digit number?

Back

When adding 10 to a two-digit number, the tens digit increases by 1, and the units digit remains the same. For example, 25 + 10 = 35.

Front

What happens to a three-digit number when you add 100?

Back

When you add 100 to a three-digit number, the hundreds digit increases by 1, while the tens and units digits remain unchanged. For example, 226 + 100 = 326.

Front

How can you quickly add or subtract 10 or 100 mentally?

Back

To add or subtract 10 or 100 mentally, focus on the place value of the digits. Adjust the tens or hundreds digit accordingly without changing the other digits.

Front

What is the result of 35 - 10?

Back

The result of 35 - 10 is 25.