This article, written for primary teachers, discusses what we mean by ‘problem-solving skills’ and draws attention to NRICH tasks which can help develop specific skills. What happens when we multiply a complex number by a real or an imaginary number? What Do You Need? Use the dice numbers and either addition or subtraction to get three numbers in a straight line. What is the smallest number of answers you need to reveal in order to work out the missing headers? Can you complete this jigsaw of the multiplication square? Set your own level of challenge, practise your table skills and beat your previous best score.

Nearly all of us have made table patterns on hundred squares, that is 10 by 10 grids. Multiply Multiples 1 Age 7 to 11 Challenge Level: Arrays, Multiplication and Division Age 5 to 11 This article explores the use of the array to support children’s thinking around multiplication and division. What’s in the Box? Can you find the factors? How many times do they flash together during a whole minute?

How many altogether kss2 this 3 by 5? In this article for teachers, Lynne explains why it should be. Can you find the factors? Use the information to find out what the three numbers were. This article for teachers describes how modelling number properties involving multiplication using an array of objects not only allows children to represent their thinking with concrete materials.

multipplication Becoming confident and competent as a problem solver is a complex process that requires a range of skills and experience. Three Dice Age 7 to 11 Challenge Level: Share Bears Age 5 to 7 Challenge Level: Working Backwards at KS2 Age 7 to 11 The upper primary tasks in this collection could each be solved by working backwards. Multiplication and Division KS2 Age 7 to 11 The tasks in this collection encourage problej primary children to look deeper at multiplication and division.

In this activity, the computer chooses a times table and shifts it. Multiplication and Division KS2.

## Multiplication Squares

Your Dolving Age 5 to The Zios have 3 legs and the Zepts have 7 legs. The great planetary explorer Nico counted 52 legs. This group activity will encourage you to share calculation strategies and to think about which strategy might be the most efficient. Can you find any two-digit numbers that satisfy all of these statements?

Age 5 to 11 The tasks nirch this feature are all about practising times tables, but with a difference Choose a symbol to put into the number sentence. This challenge is a game for two players.

# Multiplication and Division KS1 :

How might you show them in a picture, with things, with numbers and symbols? Doubling Fives live Age 5 to 7 Challenge Level: Our Numbers Age 5 to 7 Challenge Level: All the Digits Age 7 to 11 Challenge Level: Carrying Cards Age 7 to 11 Challenge Level: An article to read with pencil and paper rnich hand.

Tasks with Interactives Age 5 to 11 teacher collection. Can you find the values at the vertices when you know the values on the edges of these multiplication arithmagons? Mystery Matrix Age 7 to 11 Challenge Level: From Objects and Images to Mathematical Ideas Age 5 to 18 This article looks at how images, concrete apparatus and representations can help students develop deeper multiplictaion of abstract mathematical ideas.

In the multiplication calculation, some of the digits have been replaced by letters and others by asterisks. We can arrange solvihg in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape.

# Long Multiplication :

Will you be the first to have four multiplicahion in a row on the number line? These eleven shapes each stand for a different number. Using the information given, can you replace the stars in the calculation with figures? How many Zios and how many Zepts were there?