Multidigit Addition & Subtraction

Front

What is multidigit addition?

Back

Multidigit addition is the process of adding numbers that have more than one digit, such as 23 + 45.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is multidigit subtraction?

Back

Multidigit subtraction is the process of subtracting numbers that have more than one digit, such as 78 - 34.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

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.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round 156 to the nearest ten?

Back

You look at the digit in the ones place (6). Since it is 5 or more, you round up to 160.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is an estimate in math?

Back

An estimate is a rough calculation of a number, often used to make quick decisions.

Front

What is the best way to estimate the sum of 350, 180, and 40?

Back

You can round each number to the nearest hundred: 400 + 200 + 0 = 600.

Front

How do you find the difference between two numbers?

Back

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

Tags

CCSS.2.OA.A.1

Front

If Colton has $925 and buys a go-kart for $559, how do you find out how much he has left?

Back

You subtract the cost of the go-kart from the amount he has: 925 - 559 = 366.

Tags

CCSS.3.OA.D.8

Front

What phrase indicates that you need to add?

Back

The phrase 'How much does Timmy and Bobby have combined?' indicates addition.

Tags

CCSS.1.OA.A.1

Front

What is the sum of 23 and 45?

Back

The sum of 23 and 45 is 68.

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5