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Each of the following shapes has a value:
$= 7$ | $= 17$ |
The value of the red shapes changes in each of the following problems.
Can you discover its value in each problem, if the values of the shapes are being added together?
(a) | $= 25$ | |
(b) | $= 51$ | |
(c) | $=136$ | |
(d) | $=48$ | |
(e) | $=100$ |
This problem would make a good starter. Make sure that paper and/or mini-whiteboards are available for pupils to jot down any workings.
How did you work this out?
Shape Times Shape involves multiplication rather than addition and requires much more sophisticated reasoning.
You could provide calculators if you want children to focus on the method rather than the arithmetic.