# Making Number Facts to 10, 20 and 30

More on a new product called Dinosaurs which make number facts to 10, 20 and 30.

Although aimed at boys, most girls will also be attracted to these colourful dinosaur families. The four blue Brachiosaurus members are clearly marked 1, 9, 11 and 19. Two face to the right and two to the left, so they can face each other and have a little chat about the ‘totals’ they make. The obvious conversation will be what their total is and this will be 10, 9 and 1 or 20, 19 and 1, or 30, 19 and 11.

The 6 Dinosaur Families each follow the same pattern, so:

- The Brachiosaurus family are numbers 1, 9, 11 and 19 and in blue.
- Stegosaurus family 2, 8, 18 and 12 in lime.
- Triceratops family 7, 3, 17 and 13 in orange.
- Velociraptor family 6, 4, 16 and 4 in green.
- Pterodactyl family 5, 15, 15 and 5 in purple.
- Tyrannosaurus family 10, 10, 20, and 0 in red.

## Don’t stop at number addition facts.

Use as mental maths subtraction sums. Look at any two family numbers, and the little chat can be ‘what is their difference in value’? The 8 and the 2 will have a difference of 6. Continue with ‘8 will be 6 more than 2, and so 2 is 6 fewer than 8. This terminology catches so many children out, and adults even have to think. Following the Sweet Counter theme of visualisation, draw dinosaur eggs to illustrate these calculations. Draw link lines between the eggs, so that you can see how many more or fewer. You might even get a little ‘cross curriculum’ work about reptiles and eggs and other cold-blooded animals.

## Now think of doubles.

You have done your double 6, 7, 8, 9, and children are comfortable with these answers. Look at the dinosaurs 9 and 19 and add the two numbers together. 9 add 9 = 18 ………. 28 will be the answer. 8 and 8 = 16 so 8 and 18 make 26 and so on.

Now any two dinosaurs can meet e.g. 14 and 3 and say the ‘total’ 17, ‘ difference’ 11, multiplication even, 42. With 18 and 2, you could even bring in division, but again visualisation – draw images to show 18 prehistoric plants, cave men etc. being eaten by 2 dinosaurs.

## Multiplication, division, and visualisation….

Don’t forget the English confusion! Poor children. Make it a little more fun with these dinosaurs. All dinosaurs have their names written under the number, so even reading and spelling work can be brought in. How many more words can you think of starting with ‘pt’?

Dinosaurs – Number Fact Families to 10, 20 & 30. Price – cards only for £5 for limited period only.