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Parents’ pages: Math: More or less is correct

Five-year-olds may be able to solve simple arithmetic problems before they learn precise addition and sub-traction math rules, reports a study in Nature. In response to basic arithmetic problems, kids came to the right approximate answer using concepts of “more than” or “less than,” called nonsymbolic arithmetic. Researchers suggest that introducing kids to math without demanding exact numbers may make young students more inclined to learn “symbolic” addition and subtraction, which requires exact calculations.