Question

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

Responses

(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)
Left Parenthesis 18 minus 8 minus 9 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

(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

Answer 1

[AI-generated answer — Bot GPT 3.5]

(18 − 8) + (−949 + 79) is the best way to group the expression to make it easiest to add.

Answer 2

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

Responses

Nothing.
Nothing.

Subtract without it.
Subtract without it.

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.

Answer 3

[AI-generated answer — Bot GPT 3.5]

Add a zero.

Answer 4

What is −18.1−5?(1 point)

Responses

−23.1
negative 23.1

−13.1
negative 13.1

23.1
23.1

13.1

Answer 5

[AI-generated answer — Bot GPT 3.5]

-18.1 - 5 = -23.1 or negative 23.1

Answer 6

What is −189.987−30.87?(1 point)

Responses

220.857
220.857

159.117
159.117

−220.857
negative 220.87

−159.117

Answer 7

[AI-generated answer — Bot GPT 3.5]

-189.987 - 30.87 = -220.857 or negative 220.857