Is the number you’re left with odd or even? You may also like Consecutive Numbers An investigation involving adding and subtracting sets of consecutive numbers. Add the two numbers on the red dice and take away the number on the green. What kind of number do you get? The fourth article builds on the third by discussing what we mean by problem-solving skills and how NRICH can help children develop these skills. This feature draws together tasks which give learners opportunities to reason for different purposes. In this addition each letter stands for a different digit, with S standing for 3.

Adding and Subtracting Age 7 to 11 In these activities, you can practise your skills with adding and subtracting. Anyone should be able to make a start on any of these resources. Got It Age 7 to 14 Challenge Level: Many opportunities to work in different ways. Number Squares Age 5 to 11 Challenge Level: How many ways can the terms in an ordered list be combined by repeating a single binary operation. Addition and Subtraction KS2.

## Adding and Subtracting

Find the Difference Age 5 to 7 Challenge Level: What are all the different possible answers? Can you use this one model to prove that your result is always true and not just true for the particular number that you chose to start with? Proof by Logical Argument Age 5 to 11 These tasks are useful contexts in which to explore proof by logical argument.

Add the two numbers on the red dice and take away the number on the green. Show that for 4 terms there are 5 cases and find the number of cases for 5 terms and 6 terms. Filter by resource type problems games articles general resources interactive environments EYFS Resources Lists Filter by age 5 to 7 7 to 11 11 to 14 14 to 16 16 to Use the information about Sally and her brother to find out how many children there are in the Brown family.

Calendar Capers Choose any three by three square of dates on a calendar page These lower primary tasks could all be tackled using a trial and improvement approach.

Can you work out the sum of the missing digits in this subtraction? Who said that adding couldn’t be fun?

## Subtraction Surprise

She arranged the cards into 6 unequal piles where each pile added to the same total. These upper primary tasks all specifically draw on the use of visualising. Number Operations and Calculation Methods – Short Problems Age 11 to 16 A collection of short problems on number operations and calculation methods. Place the numbers from 1 to 9 in the squares below so that the difference between joined subtractipn is odd.

In this article, Jennie suggests that we can support this process in three principal ways. Got It game for an adult and child. Anyone should be able to make a start on any of these resources.

What happens with different starting numbers? Three Neighbours Age 7 to 11 Challenge Level: What do you think is happening to the numbers?

In this calculation, the box represents a missing digit. Subtract your kw2 number.

# Maths Search :

If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Number live Age 7 to 11 Challenge Level: Totality Age 5 to 11 Challenge Level: Amy has a box containing domino pieces but she does not think it is a complete set. Aisha’s division and subtraction calculations both gave the same answer!

Square Subtraction Age 7 to 11 Challenge Level: Strike it Out Age 5 to 11 Challenge Level: This selection of games will support understanding solfing number. What is the same? Counters Age 5 to 11 This article for primary teachers outlines how using counters can support mathematical teaching and learning.

A game for two people, or play online.