What is 12815 − 7 + 715 + 15? Simplify your answer.(1 point)

Responses

21
21

201515
20 Start Fraction 15 over 15 End Fraction

35
35

411515

11 answers

The simplified answer is 12838

12815 − 7 + 715 + 15

12815 - 7 + 715 + 15 = 13638

How should you group the following expression to make it easiest to add? 18 − 949 + 79 − 8(1 point)
Responses

(18 − 8) + (−949 + 79)
Left Parenthesis 18 minus 8 Right Parenthesis plus Left Parenthesis negative 9 Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis

(18 − 9 − 8) + (−49 + 79)
Left Parenthesis 18 minus 9 minus 8 Right Parenthesis plus Left Parenthesis negative Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 Right Parenthesis

(8 − 18) + (49 + 79)
Left Parenthesis 8 minus 18 Right Parenthesis plus Left Parenthesis Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis

(18 − 8 − 9)

(18 − 8) + (−949 + 79)

What should you do if a place value is missing a number?(1 point)
Responses

Subtract without it.
Subtract without it.

Add a zero.
Add a zero.

Nothing.
Nothing.

Remove the last digit(s) in the number that has the additional place values.
Remove the last digit(s) in the number that has the additional place values.

Add a zero.

What is −18.1−5?(1 point)
Responses

−23.1
negative 23.1

13.1
13.1

−13.1
negative 13.1

23.1

-18.1 - 5 = -23.1

What is −189.987−30.87?(1 point)
Responses

−159.117
negative 159.117

220.857
220.857

159.117
159.117

−220.857

-189.987 - 30.87 = -220.857