Geometry - using Co-ordinates
Use this button to explore maps of Ashburton to answer questions for Tuesday 11th August. Click on to the satellite map as well. See if you can find St. Joseph's School or where you live. Look at how the map makers have labelled the map.
In Term 2 we are looking at the strategies we use for solving addition and subtraction problems.
Word problems with decimals
Use this interactive activity to practise adding and subtracting decimals in your head. Use the split strategy.
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Adding Positive and Negative Numbers
This web page and the attached worksheet and examples are great for explaining negative and positive numbers or integers.
Watch the video below to help you understand negative numbers.
Adding decimals bit by bit
This video shows how to add decimals bit by bit. It adds the hundredths, then the tenths and then the wholes. It gives you a real understanding of what hundredths and tenths are.
Using Equal Additions for Subtraction
Equal additions (or subtractions) for subtraction is an easy strategy. It involves doing the same thing to both sides of a subtraction equation. It is to make one of the numbers into a tidy number.
Would you change the 1st number as in this video? Or the 2nd one to make it easy to subtract?
Would you change the 1st number as in this video? Or the 2nd one to make it easy to subtract?
Using reversibility for subtraction problems - can also be called reversibility and jump strategy because you are jumping to 'clean' numbers. It is also called 'Don't subtract - add' because you put the unknown in the middle e.g 64 + ? = 92 for 92 - 64 = ?
Using algorithms for subtraction
Using the standard written method (or algorithm) for solving equations with bigger numbers is sometimes the most efficient strategy. Use the videos below to help you know how to do this for subtraction.
Using algorithms with decimals
Use the websites below to help you practise the variety of strategies you can use. Click on the links.
During Maths we are concentrating on the Knowledge we need at each stage to be able to work with problems.
One of the things we need to learn is about the value of digits, and the fact that where they are in a number tells us what value they have. This is for really big and really small numbers.
Learning About the Place Value Houses.
This is a cool little youtube which explains how there are ones, tens and hundreds in each place value house - no matter how big you go!
Rounding Numbers
Being able to round numbers to an easy number to work with is an important skill. To help you round, you need to know the 'place' that you are rounding to eg. if you are rounding to nearest 10, you first look at the digit in the 10s column. Then you look at the digit to the right of the number. If it is 5 or bigger, you round the digit in the 10s place up. If it is 4 or smaller you round it down. Watch the video to the right to find out more about how to do this. |
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Click on the picture to the left to take you to a fun game where you can practise rounding of numbers.
Click on the picture to the right to practise rounding numbers in a fun basketball shoot-out.