true or false equations? find the unknown.

Select the false equation.

• 12 + 8 = 15 + 5

• 12 x 4 = 20+ 28

• 52 - 20 = 42 – 30

• 10 x 4 = 20 + 20

Select why this equation is true or false without adding.

 48 + 17 = 40 + 16

• True, because both 48 minus 17 and 40 minus 16 result in the same answer of 24.

• False, because 48 plus 17 does not equal 40. 

• True, because if we compare 48 to 17 and 40 to 16 they are exactly the same distance apart on a number line.  

• False, because if 8 is subtracted from 48 to get 40 then, 40 and 17 would not equal 40 and 16.  

The Clark's family wants to go on a trip to the Zoo.  Admission prices are $11 for each adult and $8 for children.  Parking is an additional $25.  If the Clark family has 2 adults and 3 children, which equation could be used to solve for the total cost (t) of their trip?

•  t = (2 + $11) + (3 x $8)

•  t = (2 + $11) + (3 + $8)

•  t = (2 x $11) + (3 x $8)

•  t = (2 - $12) + (3 x $7)

John has 30 marbles. Mia has m marbles. John has 10 times as many marbles as Mia. Choose the equation that correctly represents the number of marbles Mia has.

• 30 - 10 = m

• 10 x 30 = m

• 10 + m = 30

• 10 x m = 30

Match the Numbers with the factors that belong.

• 1, 2, 4, 8, 16, 32

• 24

• 1, 2, 3, 4, 6, 8, 12

• 64

• 1, 2, 4, 7, 8, 14, 28

• 25

• 1,3,9

• 56

• 1,5

• 27