Question

find all the factor pairs for 90 and complete the equations. each equation should use a different pair of factors.
90 = 1·
90 = ·45
90 = ·
90 = ·
90 = ·
90 = ·

Explanation:

Step1: Find factor with 1

To find the pair for 1, divide 90 by 1.
$\frac{90}{1}=90$

Step2: Find factor with 45

To find the pair for 45, divide 90 by 45.
$\frac{90}{45}=2$

Step3: Next factor pair (3,30)

Divide 90 by 3 to get its pair.
$\frac{90}{3}=30$

Step4: Next factor pair (5,18)

Divide 90 by 5 to get its pair.
$\frac{90}{5}=18$

Step5: Next factor pair (6,15)

Divide 90 by 6 to get its pair.
$\frac{90}{6}=15$

Step6: Next factor pair (9,10)

Divide 90 by 9 to get its pair.
$\frac{90}{9}=10$

Answer:

$90 = 1 \cdot 90$
$90 = 2 \cdot 45$
$90 = 3 \cdot 30$
$90 = 5 \cdot 18$
$90 = 6 \cdot 15$
$90 = 9 \cdot 10$