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Kitchen Calculations
Have a look in your kitchen cupboard. What can you find measured in grams by weight?
Write what the items are and what they weigh. Can you find 5 items?
Can you find two or more items which weigh altogether:
Less than 500 g?
More than 1000 g?
Can you find two objects to have a difference of less than 100 g?
Can you find two objects to have a difference of more than 100 g?
Which do you need a written method for and which can you do in your head?
For example:
Ruby found a tin of baked beans, a packet of rice, some tomato puree, a jar of raspberry and a block of cheese.
The total weight of a block of cheese and a jar of jam is 227g + 359g.
2
2
7
+
3
5
9
5
8
6
The difference between a tin of baked beans and some tomato puree is 430 — 200. I can calculate this in my head 430 — 200 = 230 g
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