Mixed operations are math problems where you add or subtract. In this lesson, we will focus on problems with a two-digit number and a one-digit number.
You will always start with a two-digit number and then add or subtract a smaller one-digit number.
To add, use place value, counting on, or breaking apart the smaller number.
Breaking apart numbers makes it easier to add to a “friendly number” like 60, 70, or 80.
To subtract, use place value, counting back, or breaking apart the smaller number.
Breaking apart the smaller number helps when subtracting to reach a “friendly number” like 40, 50, or 60.
We can use addition and subtraction in real-world problems to understand how they work in daily life.
Always ask yourself: Am I adding to make the number bigger, or subtracting to make the number smaller?