# How to do Addition And Subtraction

**English**

**Math**>

**Addition And Subtraction**

**9 - 10**

**How to do Addition And Subtraction**

**What is the process of carrying over in addition and subtraction?**

Adding the numbers from right to left

Subtracting the numbers from right to left

Moving the digit from one place value to the next

Multiplying the numbers from right to left

**When do you need to carry over in addition and subtraction?**

When the sum or difference is greater than 10

When the sum or difference is less than 10

When the sum or difference is equal to 10

Carry over is not needed in addition and subtraction

**How do you solve a 3 by 3 digit addition problem?**

Add the numbers from left to right

Add the numbers from right to left

Carry over is not needed in a 3 by 3 digit addition

Subtract the numbers from left to right

**How do you solve a 4 by 4 digit subtraction problem?**

Subtract the numbers from left to right

Subtract the numbers from right to left

Carry over is not needed in a 4 by 4 digit subtraction

Add the numbers from left to right

**What is the result of 15 + 27?**

32

39

42

52

**What is the result of 73 - 48?**

25

32

39

52

**What is the result of 126 + 348?**

361

462

474

4789