Equivalent Equations
True or False
20 x 9 = 9 x (2 + 10)
False
20 x 9 = 9 x (2 + 10)
180 = 9x12
270 = 108
5 x 15 =
5 x 15 = 75
Sam saved 4 times as much money as his brother, Nick. He saved $30. How much money did Sam save?
4 x 30 = 120
12 x 16 =
192
Forrest says there are 4 tens in 140. Alex says there are 14 tens in 140. Ms. Vohland says they are both right. How can that be? Explain.
There is a 4 in the 10 place value, there is also a total of 14 tens in the whole number.
True or False
16 x 18 = (16 x 10) + (16 x 8)
True
16 x 18 = (16 x 10) + (16 x 8)
4 x 25 =
4 x 25 = 100
Aliyah earns money selling lemonade. She makes 25 cents for each cup of lemonade she sells. If she sells 9 cups, how much money does she make?
25 x 9 =
20 x 9 = 180
5 x 9 = 45
180 + 45 = 225
100 x ____ = 400
4
Fill in the blanks for the ratio table:
1 - 8
2 -
- 40
16
5
True or False
3 x 300 = (3 x 3) x 100
True
3 x 300 = (3 x 3) x 100
8 x ___ = 160
8 x 20 = 160
One day, Riley and Olivia washed windows together. They earned $29 and split it evenly. How much money did they each get?
$29 / 2 = 14 R 1 = $14.50 each
50 x ____ = 250
5
Which of these numbers is prime?
10
22
28
11
11
True or False
21 / 2 = 11 R 1
False
2 x 10 = 20 + R1
4 x 13 =
4 x 13 = 52
Daniel also sells lemonade. He charges 10 cents for a small cup of lemonade and 25 cents for a large cup.
If Daniel sells 12 small cups and 4 large cups, how much money does he make?
(12 x 10) + (4 x 25) =
120 + 100 =
220 = $2.20
20 x 6 = ____
120
Fill in the blank.
(26 x 30) = (20 x 30) + (____ x 30)
Fill in the blank.
15 x 10 = (___ x 10) + (5 x 10)
10
11 x 16 =
11 x 16 = 176
Darli has 210 marbles. Penelope said, "Darli has 3 times as many marbles as I do!" Which equation could represent this situation. (P stands for Penelope's marbles)
210 x 3 = P
3 x 210 = P
3 x P = 210
210 x P = 3
3 x P = 210
30 x ____ = 120
4
Romeo was cleaning his room. He found 17 toy cars and decided to give them to 2 of his friends.
Romeo divided the 19 tiny cars evenly between the 2 friends. Which equation shows how things worked out?
19 / 2 = 9 R1
19 / 2 = $9.50
19 / 2 = 9 1/2
Explain your choice. Why did you choose that equation?
19 / 2 = 9R1
I chose this equation because there could be one car left over, the problem isn't talking about money and you can't cut a car in half.