USA 2 Review (Units 4 & 5)

Front

What is the sum of 6 + 4 + 2?

Back

12

Front

If 12 - 4 = ? - 8, what is the missing number?

Back

16

Front

How do you calculate the total number of toys if Maria has 6 boats, Joseph has 10 cars, and Jesus has 2 horses?

Back

Add the number of toys: 6 + 10 + 2 = 18.

Front

If Cari has some pencils and Nora has some pencils, and together they have 13 pencils, how can you express this mathematically?

Back

Let C be the number of pencils Cari has and N be the number of pencils Nora has. The equation is C + N = 13.

Front

What addition equation can be used to solve for □ in the equation □ = 10 – 2?

Back

The equation is □ + 2 = 10.

Front

What is the principle of addition in solving equations?

Back

The principle of addition states that you can add the same number to both sides of an equation without changing its equality.

Front

What is the definition of a sum in mathematics?

Back

The sum is the result of adding two or more numbers together.

Front

How do you find the missing number in an equation like 12 - 4 = ? - 8?

Back

You can isolate the variable by adding 8 to both sides and then solving for the missing number.

Front

What is the total number of toys if three friends have 6, 10, and 2 toys respectively?

Back

The total is 18 toys.

Front

How can you express the total number of pencils if two people have a combined total?

Back

You can express it as an equation: P1 + P2 = Total.