2-digit Addition and Subtraction

What is 2-digit addition?

• The process of adding two numbers that each have two digits, such as 48 + 27.

• The process of adding single-digit numbers only.

• The process of subtracting two-digit numbers.

• The process of multiplying two-digit numbers.

What number do you add to 45 to get 50?

• 3

• 5

• 7

• 10

What is the first step in solving 2-digit subtraction?

• Line up the numbers by their place values (tens and ones).

• Subtract the smaller number from the larger number.

• Estimate the answer before calculating.

• Write the numbers in a vertical format.

What do you do if the sum of the ones place is 10 or more?

• You carry over 1 to the tens place.

• You ignore the ones place.

• You subtract 10 from the sum.

• You add 10 to the tens place.

What is a missing number problem in subtraction?

• A problem where you need to find a number that, when subtracted from another number, gives a specific difference.

• A problem that involves adding two numbers to find a total.

• A problem where you need to identify the largest number in a set.

• A problem that requires you to multiply two numbers to get a product.

What is the sum of 48 + 27?

• 65

• 70

• 75

• 80

What number do you subtract from 50 to get 40?

• 5

• 10

• 15

• 20

What is a missing number problem in addition?

• A problem where you need to find a number that, when added to another number, gives a specific sum.

• A problem that involves subtracting two numbers to find a difference.

• A problem that requires multiplying two numbers to find a product.

• A problem where you need to divide a number to find a quotient.

What do you do if the number you are subtracting is larger than the number you have?

• You need to borrow from the next place value.

• You can ignore the larger number.

• You should add the two numbers together.

• You need to multiply the numbers instead.

What is the sum of 54 + 39?

• 91

• 92

• 93

• 94