Algebraic Thinking

What number goes in the empty box?

• 9
• 19
• 20
• 10

Which equation below means "multiply 6 and the quotient of 12 and 3?"

• 6 x 12÷  3
• (6 x 12) ÷ 3
• 12 ÷ (3 x 6)
• 6 x (12 ÷ 3)

What is the rule?

• Input x 2 = output

• Input x 3 = output

• Output x 3 = input

• Input + 3 = output

Bob was playing basketball. He scored 5 baskets in the first half. In the second half he scored x baskets. At the end of the game he had scored 12 baskets. What is x?

• 17

• 24

• 5

• 7

 $6x+\left(1+1\right)=8\$  what is x?

• 6009

• 1

• 2134

• 2

 $20x\left(4+1\right)\div20+14=24$  what is x?

• 2

• 6

• 24

• 8

 $15x\left(1+1\right)\div3+36=66$  what is x?

• 8

• 98

• 101

• 3

 $8x\ -\left(22-\left(4^2\ -\ 1\right)\right)=57$  what is x?

• 9

• 5757874789872575548947583975

• 8

• 21

Which operation would you do first in the following equation?
10 - 4 ÷ 1 · 5

• Subtraction
• Division
• Multiplication
• Addition 

Which operation would you do first?
( 12 + 10) ÷ 10 · 14 - 6

• Division
• Multiplication
• Addition
• Subtraction