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 removing a part.

Front

What does it mean to estimate?

Back

Estimating means finding a number that is close to the exact answer, often by rounding to make calculations easier.

Front

How do you subtract two numbers?

Back

To subtract two numbers, you take the second number away from the first number. For example, 5 - 2 = 3.

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another. For example, the difference between 10 and 4 is 6.

Front

How can you check your subtraction?

Back

You can check your subtraction by adding the result to the smaller number. If it equals the larger number, your subtraction is correct.

Front

What is the term for the number being subtracted from?

Back

The number being subtracted from is called the 'minuend'.

Front

What is the term for the number being subtracted?

Back

The number being subtracted is called the 'subtrahend'.

Front

Estimate 345 to the nearest ten.

Back

345 rounded to the nearest ten is 350.

Front

What is 700 - 237?

Back

700 - 237 = 463.

Front

If Lainey has 157 rocks and Norah has 181 rocks, how many more rocks does Norah have?

Back

Norah has 24 more rocks than Lainey.