Addition and Subtraction with regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is when you combine numbers that are greater than 10 and carry over to the next place value.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is when you borrow from the next place value to subtract a larger digit from a smaller digit.

Front

What is the sum of 23 and 57?

Back

80

Front

What is the difference when you subtract 47 from 82?

Back

35

Front

What is the difference when you subtract 17 from 42?

Back

25

Front

What is the difference when you subtract 29 from 56?

Back

27

Front

What is the sum of 68 and 88?

Back

156

Front

How do you add two-digit numbers?

Back

Align the numbers by place value, add the ones, and if the sum is 10 or more, carry over to the tens.

Front

How do you subtract two-digit numbers?

Back

Align the numbers by place value, subtract the ones, and if you can't subtract, borrow from the tens.

Front

What is a two-digit number?

Back

A two-digit number is a number that has two places, such as 10 to 99.