Monthly Archives: September 2017

Maths Support Autumn 1 Week 3

Next week, the children will be looking at addition and subtraction. In particular, the children will be adding and subtracting numbers mentally with increasing larger numbers.

Adding in your head

  • Breaking up numbers

    40 + 67 is the same as
    40 + 60 + 7, which is
    107

  • Rounding numbers

    42 + 89 is the same as
    (40 + 80) + (2 + 9), which is
    120 + 11, which is 131

  • Subtracting in your head
    1. Breaking up numbers
      63 – 37 is the same as 63 – 30 – 7
      63 – 30 = 33
      33 – 7 = 26
    2. Rounding numbers
      63 – 37 is the same as 63 – 40, then adding 3
      63 – 40 = 23
      23 + 3 = 26
    3. Counting on
      To work out 63 – 37, count on from 37 to 63
      Count on from 37 to 40 to get 3
      Count on from 40 to 60 to get 20
      Count on from 60 to 63 to get 3
      3 + 20 + 3 = 26

      Subtraction: 37 +3 = 40 + 20 = 60 + 3 = 63

You can have a go at the following games to practice adding and subtracting numbers mentally from the following website.

https://mathsframe.co.uk/en/resources/category/400

Maths Support Autumn 1 Week 2

Next week, the children will be focusing on decimals. They will be counting up and down in thousandths; recognising that thousandths arise from dividing an object into 1000 equal parts and in dividing numbers or quantities by 1000.

Ordering decimals

When ordering numbers, we should always compare the digits on the left first.

For example, which is greater: 2.701 or 2.71?

Example

Units Tenths Hundredths Thousandths
2 7 0 1
2 7 1 0

Both numbers have two units and seven tenths, but 2.701 has no hundredths, whereas 2.71 has one hundredth. Therefore, 2.71 is greater than 2.701.Another way to look at it is to write a zero at the end of 2.71 to make it 2.710 (this does not change its value, because it is after the decimal point).The two numbers are now 2.710 and 2.701. It is quite easy to see that 2.710 is bigger (just as 2710 is bigger than 2701).

When finding 1/1000th of a number we simply divide that number by 1000.

Autumn 1 Maths Support Week 1

Hello and welcome to Y5. Each week there will be maths support on the school blog to help the children prepare for the following weeks maths objectives. Next week, we will be covering place value and counting on in 100′s, 1000′s, 10,000′s and 100,000′s. To help us do this, we need to look at our place value chart.

Use place value headings to work out the value of each digit in a number.

Example of using place value headings

A number is made of one or more digits. The number 683, for example, is made of the digits 6, 8 and 3. The position of a digit in a number is very important. A digit’s value depends on its position in the number.

So the number 351489.3 is three hundred and fifty-one thousand, four hundred and eighty nine, and three tenths.

Try these links below and tackle some of the games based around place value.

https://www.topmarks.co.uk/Flash.aspx?a=activity03

https://mathsframe.co.uk/en/resources/resource/42/sequences