3rd Subtraction and Estimation

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. It shows how much is left after something is taken away.

Front

What does it mean to estimate?

Back

Estimating means making a close guess about a number or amount, often rounding to make calculations easier.

Front

How do you find the difference between two numbers?

Back

To find the difference, subtract the smaller number from the larger number.

Front

What is the term for the result of a subtraction problem?

Back

The result of a subtraction problem is called the 'difference'.

Front

If you have 500 and you subtract 200, what is the difference?

Back

The difference is 300.

Front

How can you estimate 345 - 63 to the nearest ten?

Back

Round 345 to 350 and 63 to 60. Then subtract: 350 - 60 = 290.

Front

What is the first step in solving a subtraction problem?

Back

Identify the numbers you are subtracting and determine which is larger.

Front

If Liam walked 293 feet and Ryder walked 672 feet, how do you find how many more feet Ryder walked?

Back

Subtract Liam's distance from Ryder's: 672 - 293 = 379 feet.

Front

What is the estimated difference between 234 miles and 309 miles?

Back

Estimate by rounding: 230 - 310 = -80, but the actual difference is 309 - 234 = 75.

Front

How do you check your subtraction answer?

Back

You can check your answer by adding the difference to the smaller number to see if it equals the larger number.