As your math tutor, I’m here to help you break down factor pairs of 440 step by step!
Factor pairs of 440 are any two numbers that, when multiplied together, equal 440. The question to ask is “what two numbers multiplied together equal 440?” Every factor can be paired with another factor, and multiplying the two will result in 440.
To find the factor pairs of 440, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 440. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 2.
Step 2:
Divide 440 by the smallest prime factor, in this case, 2:
440 ÷ 2 = 220
2 and 220 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 220 as the new focus. Find the smallest prime factor that isn’t 1, and divide 220 by that number. In this case, 2 is the new smallest prime factor:
220 ÷ 2 = 110
Remember that this new factor pair is only for the factors of 220, not 440. So, to finish the factor pair for 440, you’d multiply 2 and 2 before pairing with 110:
2 x 2 = 4
Step 4:
Repeat this process until there are no longer any prime factors larger than one to divide by. At the end, you should have the full list of factor pairs.
Here are all the factor pairs for 440:
(1, 440), (2, 220), (4, 110), (5, 88), (8, 55), (10, 44), (11, 40), (20, 22)
So, to list all the factors of 440: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440
The negative factors of 440 would be: -1, -2, -4, -5, -8, -10, -11, -20, -22, -40, -44, -55, -88, -110, -220, -440
Now you’ve got it! A math tutor would always encourage you to practice with different numbers to reinforce your understanding of factor pairs. Try another one!