21 + (-23) - 15

Select all the statements about the expression that are true.

It is equivalent to - 2-15 because adding 21 + (-23) is the same as subtracting 21-23.

It is equivalent to 21+8 because subtracting (-23) - 15 is the same as subtracting 23-15.

The value of the expression is 17 because 21 + (-23) - 15 is the same as 21-38.

The value of the expression is - 17 because 21 + (-23) - 15 is the same as 21 + (-38).

Question

Mathematics

Leo Wong

22 August, 10:56

21 + (-23) - 15

Select all the statements about the expression that are true.

It is equivalent to - 2-15 because adding 21 + (-23) is the same as subtracting 21-23.

It is equivalent to 21+8 because subtracting (-23) - 15 is the same as subtracting 23-15.

The value of the expression is 17 because 21 + (-23) - 15 is the same as 21-38.

The value of the expression is - 17 because 21 + (-23) - 15 is the same as 21 + (-38).

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Answers (1)

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Corey Hodge · Answer 1

It is equivalent to - 2-15 because adding 21 + (-23) is the same as subtracting 21-23. The value of the expression is - 17 because 21 + (-23) - 15 is the same as 21 + (-38). These 2 statements are true.