which of the following are true statement (a) - Any added to zero is zero. (b) - The sum of two numbers does not change when we change their order. (c) - 1 is the identity element of addition. (d) - Given any three numbers, their sum does not change when we change their grouping.
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1 true 2 true 3 falsa
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(b) - The sum of two numbers does not change when we change their order
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