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#
Arithmetic

#### Course content

#### Addition and subtraction

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#### Multiplication and division

#### Negative numbers

#### Fractions

#### Decimals

Free

249 Lessons

Basic addition and subtraction

Basic addition

Basic subtraction

Addition and subtraction within 20

Adding 8 + 7

Subtracting 14 – 6

Strategies for adding and subtracting within 100

Adding 53+17 by making a group of 10

Adding by making a group of 10

Strategies for adding 2-digit numbers

Addition and subtraction with number lines

Addition within 100

Adding 2-digit numbers without regrouping 2

Adding with regrouping

Subtraction within 100

Subtracting 2-digit numbers without regrouping 1

Subtracting with regrouping (borrowing)

Multi-digit addition with regrouping

Using place value to add 3-digit numbers: part 2

Adding 3-digit numbers

Relate place value to standard algorithm for multi-digit addition

Adding multi-digit numbers: 48,029+233,930

Three digit addition word problems

Multi-digit subtraction with regrouping

Methods for subtracting 3-digit numbers

Relate place value to standard algorithm for multi-digit subtraction

Worked example: Subtracting 3-digit numbers (regrouping)

Worked example: Subtracting 3-digit numbers (regrouping twice)

Worked example: Subtracting 3-digit numbers (regrouping from 0)

Subtracting in your head (no regrouping)

Multi-digit subtraction: 389,002-76,151

Subtraction by breaking apart

Missing number for 3-digit subtraction within 1000

Three digit subtraction word problems