As your math tutor, I’m here to help you break down factor pairs of 9800 step by step!
Factor pairs of 9800 are any two numbers that, when multiplied together, equal 9800. The question to ask is “what two numbers multiplied together equal 9800?” Every factor can be paired with another factor, and multiplying the two will result in 9800.
To find the factor pairs of 9800, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 9800. 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 9800 by the smallest prime factor, in this case, 2:
9800 ÷ 2 = 4900
2 and 4900 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 4900 as the new focus. Find the smallest prime factor that isn’t 1, and divide 4900 by that number. In this case, 2 is the new smallest prime factor:
4900 ÷ 2 = 2450
Remember that this new factor pair is only for the factors of 4900, not 9800. So, to finish the factor pair for 9800, you’d multiply 2 and 2 before pairing with 2450:
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 9800:
(1, 9800), (2, 4900), (4, 2450), (5, 1960), (7, 1400), (8, 1225), (10, 980), (14, 700), (20, 490), (25, 392), (28, 350), (35, 280), (40, 245), (49, 200), (50, 196), (56, 175), (70, 140), (98, 100)
So, to list all the factors of 9800: 1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 140, 175, 196, 200, 245, 280, 350, 392, 490, 700, 980, 1225, 1400, 1960, 2450, 4900, 9800
The negative factors of 9800 would be: -1, -2, -4, -5, -7, -8, -10, -14, -20, -25, -28, -35, -40, -49, -50, -56, -70, -98, -100, -140, -175, -196, -200, -245, -280, -350, -392, -490, -700, -980, -1225, -1400, -1960, -2450, -4900, -9800
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!