## Doubling and Halving worksheet (with ladybirds)

Great for differentiating: you can choose exactly what numbers you want your pupils to double and halve. I made this for my year 2s, but you could easily use for Year 1 as well. It includes ladybirds so they can draw on the spots as a visual aid. The wording is: 'Double ___ is ____ so Half of ____ is ____.' It should help the children to draw links between doubling and halving both verbally and visually.

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A cross-curricular maths activity inspired by Julia Donaldson's &'The Ladybird Who Heard&';.
First we looked at the powerpoint, counted the spots on the ladybirds' wings and related this to doubling and halving.
The children then made their own ladybirds out of bread (pre-cut into a circle with a cookie cutter), strawberry jam, a strawberry lace down the middle and chocolate drops placed symmetrically.
They then completed the fact sheet about their ladybird (printed out on card and folded so it could stand up on a display).

#### Ladybird double spots worksheet

A sheet for children that are starting to double. Draw the same spots on each wing and count them!

By bdavis7

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#### Worksheet for Doubles with Ladybirds Border

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#### Doubling-and-Halving Strategy to Multiply (with Arrays)

A PowerPoint which introduces the 'Doubling-and-Halving Strategy for Multiplication'.
This PowerPoint uses an array to show the multiplication strategy of doubling one factor and halving the other factor to help to work out some multiplication problems.
Doubling and halving is therefore related to thinking that ‘restructures’ an array to make it more manageable to multiply (e.g. 3 × 18 = ___ can be rewritten as 6 × 9 = ___).
Very visual resource which helps students see that the total number of circles in an array (the product) stays the same when an array is cut and rearranged.
No text: so recommend that the teacher walks through the first couple of example slides and then students verbally explain the following examples to their peers.
Order of animations:
1) Tricky array and sum is shown.
2) Confused smiley bounces in. (explain here that if you don't know your 15 times table etc. this could be hard)
3) Scissors appear and cut the array - array restructures into simpler array (double of one factor/half of the other)
4) New corresponding sum appears - click & answer is shown
5) Array restructures to first formation and tricky sum is shown again
6) As the total number of circles has remained the same throughout the sequence the answer should be obvious :-)
[7) Optional - reverse arrow through slide show to reinforce what has happened]
I use it alongside other strategies so that it is presented as an option for mental computation involving multiplication.
Hope students around the world enjoy them and that it makes multiplication that little more enjoyable.
Please rate and comment politely, all my resources are shared freely.

By barang

- (0)
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#### Doubling and Halving worksheet (with ladybirds)

Great for differentiating: you can choose exactly what numbers you want your pupils to double and halve. I made this for my year 2s, but you could easily use for Year 1 as well.
It includes ladybirds so they can draw on the spots as a visual aid.
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'Double ___ is ____
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Half of ____ is ____.'
It should help the children to draw links between doubling and halving both verbally and visually.

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