Addition in Year 3

Add and subtract ones from 3-digit numbers.

Add and subtract ones from 3-digit numbers.

Add and subtract ones from 3-digit numbers.

A variety of addition questions, including finding different ways to make totals.

Adding and subtracting a 1-digit number from a 3-digit number with the help of place value grids.

Find three numbers to make totals, with the help of number lines. Two steps to work these out, making them quite hard.

A selection of mini investigations, finding how many different totals can be made.

A tricky set of mental addition questions, adding teens to 2-digit numbers.

Number bonds to 100 with images of creatures.

Number bonds to 100 with images of fish.

Number bonds to 100 with a hundred square.

Quick revision of adding multiples of 10. A nice easy break from the hard stuff!

More adding multiples of 10 to 2-digit and 3-digit numbers. The units remain the same in these questions.

Help with adding whole tens and whole hundreds ?in your head?.

Adding whole hundreds with visual help.

More adding whole hundreds.

Number bonds to 1,000 with the help of counters.

Number bonds to 1,000 with the help of bar model.

Using part-whole models for number bonds of 1,000.

Adding multiples of 100, often crossing the thousands boundary.

More practice at adding two multiples of 100.

Knowing pairs of numbers that make 10 will make these pages easy: pairs of multiples of 100 that total 1000.

Adding hundreds and tens with visual help.

More addition of whole hundreds and tens with visual help.

Add whole hundreds to 3-digit numbers mentally.

More quick mental addition of 3-digit numbers and multiples of 100.

More mental addition of 3-digit numbers and multiples of 100.

Today we are going to look at a quick way that you can add 99 to a 3-digit number.

Adding 99 by adding 100 and subtracting 1.

Use knowledge of place value to add quickly.

You may have seen tables' grids: these are addition grids and work in just the same way, adding rather than multiplying.

Adding three numbers: stop watches at the ready to see how quickly these can be completed correctly.

Adding several numbers. A useful tip is to look for pairs of numbers that make 10 and do that part of the sum first.

Practise finding pairs of multiples of 5 that total 100. There are only about ten pairs and if possible they should be learnt.

What number do you need to add to make a total of 100? Probably the best way is to add on to the next whole ten and then count on in tens to 100.

Find the missing numbers to make the total 100.

More problems involving making a total of 100.

Practice with helping to know pairs of numbers that make 100.

Try these addition of three, single digit numbers. Remember to look for pairs that make 10.

Look for pairs of numbers that make 20 in these addition questions.

Adding 9 or 11 to 3-digit numbers by adding 10 and adjusting.

Use the technique for adding 9 for adding 19, 29, 39 etc. This makes hard looking calculations quite easy.

For those children who need a little extra practice at addition using mental techniques learnt earlier.

Look at the addition number sentence. What could the two missing numbers be?

Several ways to investigate the relationship between addition and subtraction.

Two helpful tips on these pages: skills that are essential for fast mental calculating.

More practice at adding the nearest whole ten and adjusting, as well as looking at addition patterns.

Maths is all about patterns. Here we have an addition table with interesting diagonal patterns as well as seeing patterns in addition number sentences.

Some straightforward adding to hundreds. These give confidence with using larger numbers.

Using bar modelling to help with adding three numbers to make 100.

Using bar models to help add a multiple of 10 to a 3-digit number.

Using bar models to help with adding two 3-digit numbers not crossing tens or hundreds.

Use bar modelling to help with making 1000.

Adding 3 numbers to make 1000 using bar models

Add and subtract a 2-digit or 3-digit number using bar models

Master mental addition skills.

Master mental addition skills.

Master mental addition skills.

Master mental addition skills.

Techniques to help with understanding written methods subtraction. Jottings only at this stage, which some find rather complicated.

Moving towards the standard method of written addition, adding the least significant figures first (ones).

Expanded addition really helps to show what is happening when using the formal written method of addition.

Today we are looking at the formal, written method of addition for adding two, 2-digit numbers.

Today we are looking at the formal, written method of addition for adding a 2-digit number to a 3-digit number.

Today we are looking at the formal, written method of addition for adding two 3-digit numbers.

Add two 3-digit numbers with no exchange.

Addition using the formal method for 2-digit numbers.

Adding a 2-digit number to a 3-digit number using the standard written method.

Using the formal written method to add two 3-digit numbers.

Adding multiples of ten to three digit numbers using the standard written method.

Simple practice using the written method to add hundreds to 3-digit numbers.

Using squared paper to set out formal written addition.

Place each of the numbers into the calculations to make them correct. 2-digit numbers only.

Place numbers into the calculations to make them correct.

Place numbers into the calculations to make them correct.

Missing digits for addition of 3-digit numbers.

Add two numbers with no exchange.

Using digit cards to make and add two 3-digit numbers.

Using digit cards to make and add two 3-digit numbers.

Add and subtract a 2 -digit and 3-digit number

Being able to check calculations quickly and efficiently is an important part of calculating.

Addition Calculating Concepts for Year 3

Addition and subtraction statutory requirements for 2015.