L4 Teacher's Notes Topic: Number & Algebra Number Grids What is the rule to work out the arrowed numbers? 12 10 20 2 Here are the rules for a number grid.

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Presentation transcript:

L4 Teacher's Notes Topic: Number & Algebra Number Grids What is the rule to work out the arrowed numbers? Here are the rules for a number grid. 12 Use the rules to write the missing numbers in these number grids What changes could we make?  change the numbers  change the operations  change the shape  is there always a unique solution for the last type of grid?  could use algebra  use percentages - eg find the left number as a percentage of the right Blank grids are provided

Number Grids Here are the rules for a number grid This number is the sum of the numbers in the middle row This number is the product of the numbers in the middle row What is the rule to work out the arrowed numbers?

Use the rules to write the missing numbers in these number grids