4.3 Test Review

There are 120 students in the 6th grade at middle school. Each class has 20 students. How many 6th grade classes are there? Create the equation down below.

Answer explanation

Make sure you read the word problem carefully. It is tell you what operation you are using. Each means multiplication.

Tags

CCSS.HSA.CED.A.3

Which equation has a solution of x=3.6?

• -4.2 + x = -7.8

• -2x = 7.2

• 3.2 - x = 0.4

Answer explanation

Just input 3.6 into each equation to see which one equals to the correct answer.

Tags

CCSS.6.EE.B.5

Answer explanation

Remember that you are x, your girlfriend/boyfriend is 4 (the number next to you) and your friend is 24. You want your friend to leave first, so subtract 24 on both sides. Then, you need your partner to leave next, so you multiply each side by 4.

Tags

CCSS.7.EE.B.4A

Write the expression that is equivalent to 6(2x - 14)

Answer explanation

Remember, you need to multiply each inside number by the outside number.

Tags

CCSS.6.EE.A.4

Write the expanded expression for 13 (s + 7) - 5

Answer explanation

Remember, you multiply each number inside the parentheses by the outside number. You are not multiplying 5 by 13 because 5 is NOT in the parentheses.

Tags

CCSS.6.EE.A.3

 Which problem situation could be solved using the equation shown below?

5+r=8

• Five people were on a bus before r more people got on at York Street. If there are 8 people on the bus now, how many got on at York Street?

• Melissa had 8 strawberries and picked 5 more strawberries off her plant. If she had r strawberries in all, how many strawberries did she have?

• Eight birds can fit into each birdbath at a park. There are 5 bird baths at the park. What is r, the total number of birds in the birdbaths when they are full?

• Jared had r marbles. His sister borrowed 5 marbles. If Jared had 8 marbles left, how many marbles did Jared have in all?

Answer explanation

Make sure you read the word problem correctly and underline key words to understand if you are adding, multiplying, dividing, or subtracting.

Tags

CCSS.6.EE.B.7

Holly bought a magazine subscription for a year. She paid $27. Holly wanted to find the price, p, of the subscription each month. She created the model shown to help find this price.

• $39.00

• $2.25

• $324.00

• $22.50

Answer explanation

Remember, the opposite of multiplication is division. So, you divide 27 by 12, which will give you 2.25

Tags

CCSS.HSA.REI.A.1

Write the other expression that is equivalent to 23 + (75 + 46)

*a type of property we talked about (Commutative, Associative, Identity, Inverse)

• 23-(75-46)

• (23+75)+46

• (23x75)x46

Tags

CCSS.7.NS.A.1D

Answer explanation

Remember, PEMDAS. First, look for any parentheses with operations in it. If not there, then look at exponents. Next, either multiplication or division (left to right). After that, addition or subtraction (left to right).

Tags

CCSS.7.NS.A.3