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| A definite thumbs up for great thinking |
Solving maths questions when you are given all of the information you need is one thing but what what athinking bout when you are given the answer and have to find the missing information! Confused? You could be, if you haven't got your maths brain switched on fully!
Ganges have been solving all manner of number trio problems and then taking things a step further with the linked family of calculations. As long as you understand that addition is the inverse (opposite) of subtraction you are fine.
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| Using Numicon to check is a good idea |
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