## Lessons:

15 lessons

### Adding and subtracting 1-digit numbers to/from 3-digit numbers

This lesson will teach different mental strategies to add and subtract, including regrouping.

### Adding multiples of 10 to 3-digit numbers

This lesson will use known number facts in order to mentally add multiples of 10 to 3-digit numbers

### Subtracting multiples of 10 from 3-digit numbers

This lesson will use known number facts to mentally subtract multiples of 10 from 3-digit numbers

### Adding and subtracting multiples of 100 to/from 3-digit numbers

This lesson applies known number facts and strategies for adding and subtracting to larger numbers

### Adding two 3-digit numbers (without regrouping)

In this lesson we will partition 3-digit numbers in order to add them accurately mentally.

### Subtracting two 3-digit numbers (without regrouping)

In this lesson we will learn to partition 3-digit in order to subtract them accurately mentally.

### Applying rounding for estimating (adding)

This lesson will build on knowledge of the 10 times table in order to estimate by rounding to answer addition questions

### Applying rounding for estimating (subtracting)

This lesson will build on knowledge of the 10 times table in order to estimate by rounding to answer subtraction questions

### Adding two 3-digit numbers (regrouping in one column)

This lesson will build on knowledge of partitioning and estimating and introduce column addition.

### Adding two 3-digit numbers (regrouping in multiple columns)

This lesson will look at using column addition when a number requires regrouping in more than one column when adding.

### Subtracting 3-digit numbers (regrouping tens to ones)

This lesson will build on knowledge of column addition and introduce regrouping for column subtraction.

### Subtracting 3-digit numbers (regrouping hundreds to tens)

In this lesson we will focus on column subtraction where regrouping from the hundreds into the tens column is needed.

### Subtracting 3-digit numbers (regrouping in multiple columns)

This lesson will consolidate learning on column subtraction and will practice regrouping across all columns

### Solving addition and subtraction word problems

This lesson will consolidate learning on column addition and subtraction by moving onto applying this knowledge to word problems.

### Solving word problems with unknown values

In this lesson we will be answering addition and subtraction word problems which require us to identify the unknown quantity.