Pre-Algebra Lesson

Which one is the variable?
2d - 6

• 2d
• 2
• d
• 6

Which one is the coefficient?
10y + 4

• y
• 10
• 4
• 10 and 4

Write a numerical expression to match this phrase:
the sum of nine and twelve

• 9 + 12
• 9 - 12
• 9 / 12
• 9 x 12

Write a numerical expression to match this phrase:
the difference of fifteen and ten

• 10 + 15
• 15 - 10
• 15 x 10
• 15 / 10

Write a numerical expression to match this phrase:
the cost of ten books if each costs three dollars

• 10 - 3
• 10 / 3
• 10 x 3
• 10 + 3

Write a numerical expression to match this phrase:
the number of students in each group if twenty students are divided into 5 equal groups

• 20 / 5
• 20 x 5
• 20 - 5
• 20 + 5

Which one is the coefficient?
6c + 2d

• c and d
• 6
• 2
• 6 and 2

Which one is the variable?
7a + 9b

• 9
• a
• b
• a and b

Use the order of operations to evaluate:
20 - 3 x 5

• 85
• 34
• 5
• 12

Use the order of operations to evaluate:
4(10 - 7) + 2 x 3

• 12
• 18
• 32
• 15