Using Fives in Mathematical Expressions

The video tutorial explains how to make equations true using parentheses and basic arithmetic operations. It demonstrates solving two equations: the first equation is made to equal 30 by forming a six using three fives and multiplying by five. The second equation is made to equal 50 by adding two products of 25, each formed by multiplying two fives. The tutorial emphasizes clarity by using parentheses.

How can you form the number 6 using three fives and basic arithmetic operations?

• 5 + 5 + 5

• 5 - (5 / 5)

• 5 * 5 - 5

• (5 / 5) + 5

Tags

CCSS.6.EE.A.1

What is the result of multiplying the expression (5 / 5) + 5 by 5?

• 25

• 30

• 35

• 40

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Which of the following expressions equals 50 using the numbers 5 and 5?

• (5 * 5) + (5 * 5)

• 5 + 5 + 5 + 5

• (5 + 5) * 5

• 5 * (5 + 5)

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

How can you form the number 25 using two fives?

• 5 + 5

• 5 - 5

• 5 * 5

• 5 / 5

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Why is it suggested to use parentheses in the expression for clarity?

• To make the expression longer

• To change the result of the expression

• To clearly show the order of operations

• To make the expression more complex

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2