Doubling & Halving
These activities support the develoment of halving and doubling strategies using number facts, inverses and estimating.
Counting Sheep
Each sheep has a halving or doubling statement. Match up the inverse pairs by dragging the sheep into the correct pens. ...
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First used for Objective
Use knowledge of number operations and corresponding inverses, including doubling and halving, to estimate and check calculations
I can estimate and check my calculations
Year 3, Block B, Unit 1
Doubling Machine
The doubling machine takes random numbers and doubles them but for every correct number it produces it also makes three ...
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First used for Objective
Use knowledge of number operations and corresponding inverses, including doubling and halving, to estimate and check calculations.
I can estimate and check my calculations.
Year 3, Block B, Unit 3
Division Ducks
The banner shows a question about finding a fraction of a number. One of the ducks has the correct division statement to...
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First used for Objective
Find unit fractions of numbers and quantities (e.g. 1/2, 1/3, 1/4 and 1/6 of 12 litres)
I can find fractions of numbers by using division
Year 3, Block E, Unit 1
Mystery Number
Triangle man thinks of a number he doubles it he adds another number to it - can you use the inverse operations, doublin...
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First used for Objective
Identify pairs of factors of two-digit whole numbers and find common multiples (e.g. for 6 and 9)
I can find all the factor pairs for a two-digit number
Year 5, Block A, Unit 2
Split and Double Machine
Operate the doubling machine, making the correct choices to first partition a 2 digit number, then double the tens and u...
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First used for Objective
Identify the doubles of two-digit numbers; use these to calculate doubles of multiples of 10 and 100 and derive the corresponding halves
I can double two-digit numbers
Year 4, Block A, Unit 1
Perfume Patterns
Drag and drop the perfume bottles to complete a number pattern. The numbers have to be in the correct sequence. There ar...
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First used for Objective
Identify the doubles of two-digit numbers; use to calculate doubles of multiples of 10 and 100 and derive the corresponding halves
I can work out doubles of two-digit numbers
Year 4, Block B, Unit 3
First used for Objective
Use knowledge of place value and addition and subtraction of two-digit numbers to derive sums and differences and doubles and halves of decimals (e.g. 6.5 2.7, half of 5.6, double 0.34)
I can double and halve decimals.
Year 5, Block E, Unit 2
Percentage Cuts
Practice estimating fractions and percentages of objects by helping out top chef The Great Zoltini. Follow his instructi...
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First used for Objective
Understand percentage as the number of parts in every 100 and express tenths and hundredths as percentages
I can estimate a simple fraction or percentage of a quantity.
Year 5, Block E, Unit 2