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Вопрос 50

Select all expressions and values that are equal to 9 - 4.

  1. 9 + (-4)Правильный ответ
  2. 5Правильный ответ
  3. 9 + 4
  4. 4 - 9
  5. 13

Объяснение

A subtraction is rewritten by adding the opposite of the amount taken away, so the line turns into a move of four steps left from nine and settles five above zero. Adding four instead of its opposite moves right and lands eight steps higher, while reversing the two terms gives the opposite result.

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Вопрос 50: Select all expressions and values that are equal to 9 - 4. · Integers and Negative Numbers · Questena