# Fifth and Sixth Classes

Maths Tips for 6 th class for October
This month we will focus on Multiplication, Division and 3D shapes.
Multiplication: 6 th class will be focusing on what happens to a number with decimals when you multiply it by 10, 100 or 1000. It is important that you encourage your child not to put in the decimal point until after the multiplication is completed. Also, that the decimal point does not move, it is the digits that move to the left. 6 th Class will focus on long multiplication and the insertion of the decimal points. Also it is important to note the place value of the digits after the decimal points are first tenths then hundredths next thousandths. Please say the tables each night with your child and remind them of the RUDE (Read, Underline, Draw, Estimate) approach when problem solving.

Division: Again 6 th class will be doing long division using decimal points. Place value is again important and the fact that the digits move to the right of the decimal point when dividing. We will be dividing using 2, 3 and 4 digit numbers. At home please remind your child that to put in the decimal point after the division sum is completed. Again we will be solving problems using the RUDE approach.

3D shapes: At home you ask your child to find 3d Shapes (the more unusual the better) and get them to describe them to you. Categorise the shape, number of faces, vertices, edges. A face: is the flat part of the shape e.g a dice (cube) has 6 faces. Vertices: are the corners of the shape. An edge: is joins one vertex to the other.

January Fifth and Sixth
This month the children will be learning about fractions, decimals and percentages and the relationship between all three. There is a bit of learning involved and it is important to help your child to memorise the facts that they need to learn.

The children will also be learning about prime numbers, composite numbers, square numbers and triangular numbers.
Prime numbers are numbers that have no factors except themselves and 1
Square numbers have two equal factors, 4(2×2), 9(3×3), 16(4×4) etc.. Also they can be shaped into squares using dots to figure it out.
Triangular numbers can be shaped into triangles, 3, 6, 10 (use dots to figure out triangular numbers).
A composite number is a number that can be divided evenly by numbers other than itself and 1. 9 is a composite number but it is also a square number.

February
The children will be learning about capacity in February. The following facts will be written into their maths dictionaries throughout the month.

1000ml = 1 litre
500ml = ½ litre = 0.5 L
250ml = ¼ litre = 0.25 L
750ml = ¾ litre = 0.75 L
Lines and Angles
Parallel lines are lines that never meet. Perpendicular lines form a right angle.
Vertical lines go up and down. Horizontal lines go across.
An equilateral triangle has three equal sides and three equal angles.
An isosceles triangle has two equal sides and two equal angles.
A scalene triangle has no equal sides and no equal angles.
A right angle is 90 degrees. Use the corner of your copybook to measure a right angle.
The sum of the angles of a triangle is 180 degrees.
The sum of the angles in a square is 360 degrees.
A straight angle measures 180 degrees.
Acute angles are less than 90 degrees.
Obtuse angles are greater than 90 degrees.
Reflex angles are greater than 180 degrees.
2D Shapes
A square has four equal sides.
A rectangle has four sides with opposite sides being equal.
A hexagon has six sides. An octagon has eight sides.
A nonagon has nine sides. A decagon has ten sides.
Tessellate means to fit together without leaving spaces.
The area of a triangle is ½ the base x perpendicular height.
Fifth and Sixth
March
This month the children will be learning about money.
Give your child opportunities to handle money.
Money facts to be learned:
There are 100 cent in €1.
€1.00 = 100c
€2.00 = 200c
50c = €0.50
5c = €0.05c
The children will be using the unitary method to compare value for money.
The children will be recording money using the euro symbol and the decimal point.
They will be adding and subtracting money.
VAT

Data
To find the average of three numbers you must add the three numbers and then divide your answer by 3.
Simple interest = Principle X Time X Rate
100