Year 6 Maths Facts | Year 5 Maths facts |

Year 4 maths facts | Year 3 maths facts |

## Year 4 Maths facts

**Number facts**

**1.** Know all number pairs which total 100 (e.g. 25 + 75, 42 + 58, 17 + 83)

**2.** Know all multiplication and division facts for the 2,3,4,5,6,7,8,9 and 10 times tables.

**3.** Know that ½ = 0.5, ¼ = 0.25, 1/10 = 0.1 and 1/100 = 0.01

**Understanding shape**

**4.** Know that a polygon is a closed, flat shape with three or more sides

**5.** Know that a regular polygons have equal sides and equal angles

**6.** Know the names and properties of 2D shapes as year three and:

Heptagon- a 7-sided shape

Oblong- 4-sided two right angles and two pairs equal sides but the pairs are a different length to each other

**7.** Know that an equilateral triangle has 'equal sides' and 'equal angles'

**8.** Know that an isosceles triangle has two equal sides and angles.

**9.** Know that a horizontal line goes across and a vertical line goes downwards

**10.** Know the names of 3D shapes as year three and:

Tetrahedron: Four triangular faces

Polyhedron: solid 3D shape

**11.** Know that one whole turn= 360 degrees, a half turn=180 degrees and a quarter turn (or right angle) = 90 degrees.

**12.** Know the direction of the compass points for North, South, East, West, North East, North West, South East, South West.

**Measures**

**13.** Know that 'kilo' means 1000, 'milli' means a thousandth and 'centi' means a hundredth.

**14.** Know that to convert m to cm, you multiply by 100 and to convert cm to m you divide by 100. (e.g. 4m = 400cm, 550cm = 5.5M)

**15.** Know that ½ a kg is 500g and ¼ is 250g, know that ½ km is 500m and ¼ km is 250g, Know that ½ L is 500ml and ¼ L is 250ml and that ½ M is 50 cm and ¼ M is 25cm

**16.** Know that 1000 years = a millennium

**17.** Know that a leap year has 366 days.

**18.** Know that the perimeter is the distance around the shape

**19.** Know that the area is how much surface the shape covers

**EXPLANATION AND IDEAS FOR LEARNING**

Multiplication and division facts: When children learn a times tables fact such as 4 X 5=20 they also know the associated division fact: 20 ÷ 4= 5.

Memory tricks-

Make up rhymes for tables that children frequently forget. For example: 8 X 3= Aliens at the door- 24.

Actions to go with tables facts 'Eight eights are sixty four, clap, clap, knock on the floor.'

Use an ordinary pack of playing cards!

A great way to practise table facts is to share out playing cards between you and your child. Both turn a card over and the quickest one to multiply the numbers keeps the cards. The winner is the person with the most cards.

TRIANGLES

Memory Trick

Equilateral - equal sides, equal angles- equilateral

Isosceles - I sausages (imagine two sides as sausages the same length).

Horizontal/vertical lines

Ask the child to show you with their arms a vertical line/ a horizontal line or link horizontal to a picture of a horizon.