what is additional and subtraction together?
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Addition is the "putting together" of two groups of objects and finding how many in all. ... Subtraction tells "how many are left" or "how many more or less." We say addition and subtraction are inverse operations because one operation can "undo" the other operation.
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The rules which can be used to solve the sums involving addition (+) and subtraction (-) together are: ... I: First add and then subtract, II: Solve the numbers enclosed in the brackets and then solve further.
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