Connect the model −(25+25+25) to the algorithm for solving the multiplication problem it models.(1 point)
Responses
The model represents −3⋅25, which is solved by multiplying 3 times 25 and changing the sign to get −75.
The model represents negative 3 times 25 , which is solved by multiplying 3 times 25 and changing the sign to get negative 75 .
The model represents 3⋅(−25), which is solved by multiplying 3 times 25 to get 75.
The model represents 3 times left parenthesis negative 25 right parenthesis , which is solved by multiplying 3 times 25 to get 75.
The model represents 3⋅(−25), which is solved by multiplying 3 times 25 and changing the sign to get −75.
The model represents 3 times left parenthesis negative 25 right parenthesis , which is solved by multiplying 3 times 25 and changing the sign to get negative 75 .
The model represents −3⋅(−25), which is solved by multiplying 3 times 25 to get 75.
None of the given options correctly connect the model to the algorithm for solving the multiplication problem it represents. The correct response would be:
The model represents −(25 + 25 + 25), which is solved by adding 25 + 25 + 25 to get 75 and then changing the sign to get −75.
Connect the model −4+−4+−4+−4+−4+−4 to the algorithm for solving the multiplication problem it models.(1 point)
Responses
The model represents −4⋅6, which is solved by multiplying 4 times 6 and changing the sign to get −24.
The model represents negative 4 times 6 , which is solved by multiplying 4 times 6 and changing the sign to get negative 24 .
The model represents 4⋅(−6) which is solved by multiplying 4 times 6 and changing the sign to get −24.
The model represents 4 times left parenthesis negative 6 right parenthesis which is solved by multiplying 4 times 6 and changing the sign to get negative 24 .
The model represents 6⋅(−4), which is solved by multiplying 6 times 4 and changing the sign to get −24.
The model represents 6 times left parenthesis negative 4 right parenthesis , which is solved by multiplying 6 times 4 and changing the sign to get negative 24 .
The model represents −6⋅4, which is solved by multiplying 6 times 4 and changing the sign to get −24.
The model represents negative 6 times 4 , which is solved by multiplying 6 times 4 and changing the sign to get negative 24 .
The correct response is:
The model represents −4 + −4 + −4 + −4 + −4 + −4, which is solved by adding all the values together to get −24.
Multiply −18⋅(−3)(1 point)
Responses
48
48
54
54
−21
negative 21
−54
The correct response is:
−18⋅(−3) = 54
Megan is taking a road trip. She travels 60 miles each hour. How far does she drive in 15 hours?(1 point)
Responses
4 hours
4 hours
45 miles
45 miles
900 miles
900 miles
75 miles
The correct response is:
Megan drives 60 miles each hour and she drives for 15 hours. Therefore, she drives 60 * 15 = 900 miles. So, Megan drives 900 miles in 15 hours.
Connect the model −(25+25+25) to the algorithm for solving the multiplication problem it models.(1 point)
Responses
The model represents −3⋅25, which is solved by multiplying 3 times 25 and changing the sign to get −75.
The model represents negative 3 times 25 , which is solved by multiplying 3 times 25 and changing the sign to get negative 75 .
The model represents 3⋅(−25), which is solved by multiplying 3 times 25 to get 75.
The model represents 3 times left parenthesis negative 25 right parenthesis , which is solved by multiplying 3 times 25 to get 75.
The model represents 3⋅(−25), which is solved by multiplying 3 times 25 and changing the sign to get −75.
The model represents 3 times left parenthesis negative 25 right parenthesis , which is solved by multiplying 3 times 25 and changing the sign to get negative 75 .
The model represents −3⋅(−25), which is solved by multiplying 3 times 25 to get 75.
The correct response is:
The model represents −(25+25+25), which is solved by adding 25+25+25 to get 75 and then changing the sign to get −75.
Connect the model −4+−4+−4+−4+−4+−4 to the algorithm for solving the multiplication problem it models.(1 point)
Responses
The model represents −4⋅6, which is solved by multiplying 4 times 6 and changing the sign to get −24.
The model represents negative 4 times 6 , which is solved by multiplying 4 times 6 and changing the sign to get negative 24 .
The model represents 4⋅(−6) which is solved by multiplying 4 times 6 and changing the sign to get −24.
The model represents 4 times left parenthesis negative 6 right parenthesis which is solved by multiplying 4 times 6 and changing the sign to get negative 24 .
The model represents 6⋅(−4), which is solved by multiplying 6 times 4 and changing the sign to get −24.
The model represents 6 times left parenthesis negative 4 right parenthesis , which is solved by multiplying 6 times 4 and changing the sign to get negative 24 .
The model represents −6⋅4, which is solved by multiplying 6 times 4 and changing the sign to get −24.