Addition and subtraction

Can you spot the mistake in this video? How would you work out the answer to this calculation?

Order these four calculations from easiest to hardest. How did you decide?

Can you match pairs of cards which show the same amount?

Noah saw 12 legs walk by into the Ark. How many creatures did he see?

Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.

Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?

On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?

What do you notice about these squares of numbers? What is the same? What is different?

In Sam and Jill's garden there are two sorts of ladybirds with 7 spots or 4 spots. What numbers of total spots can you make?

There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. How many eggs are in each basket?