Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to the nearest ten, hundred, etc., to make it easier to work with.

Front

What is the Associative Property of Addition?

Back

The Associative Property of Addition states that the way in which numbers are grouped when adding does not change the sum. For example, (2 + 3) + 4 = 2 + (3 + 4).

Front

What is the Commutative Property of Addition?

Back

The Commutative Property of Addition states that the order in which two numbers are added does not change the sum. For example, 3 + 5 = 5 + 3.

Front

What is the difference between 'more than' and 'less than'?

Back

'More than' means to add to a number, while 'less than' means to subtract from a number.

Front

If Mrs. Kiesling had 474 pencils and Nora sharpened 137 more, how many pencils does she have?

Back

610 pencils (474 + 137 = 611, rounded to 610).

Front

Cruz ran 252 miles, and Noah ran 112 more miles than Cruz. How many miles did Noah run?

Back

364 miles (252 + 112 = 364).

Front

Emily swam 617 laps, and Joey swam 242 laps less than Emily. How many laps did Joey swim?

Back

375 laps (617 - 242 = 375).

Front

What is the sum of 1000 and 485?

Back

1,485 (1000 + 485 = 1,485).