Powers of 10 10 4 10 3 10 2 10 10000 100 1000 1010.1 0.01 Subtract 1 from the powerAdd 1 to the power Multiply by 10Divide by 10 10 0 10 -1 10 -2 1.

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Presentation transcript:

Powers of Subtract 1 from the powerAdd 1 to the power Multiply by 10Divide by

Multiplication always makes numbers bigger Division always makes numbers smaller TRUE OR FALSE?

Calculator Challenge 1 In your envelopes you will find: A starting number A target number In pairs, take it in turns to multiply your starting number by any number you choose Can you make your target number by only multiplying? Closest to the target number wins.

Try multiplying and dividing the numbers on the left hand side by those on the right hand side / / Investigate x ÷

Organise your findings into a table: MultiplyDivide 0.11/ / / / x y

What can you see? MultiplyDivide 0.11/ / / /

Calculator Challenge 2 In pairs, choose a starting number between 1 and 20. Choose a target number between 100 and 200. Take it in turns to divide your starting number. Can you make your target number by only dividing? Closest to target number wins.

Dividing by a number less than 1 makes things bigger

Multiplying by Dividing by Is the same as Dividing by Multiplying by Is the same as 1/10 1/ /10 1/

Multiplying and dividing by powers of x 100 = / 10 = x 0.1 =9.3 / 10 = / 0.1 =0.27 x 10 = x 0.01 =0.63 / 100 = / 0.01 =5.96 x 100 =596

Multiplying by a number less than 1 makes things smaller. Dividing by a number less than 1 makes things bigger