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Guess and check used to be called trial and error. If you look at 645 and realize that 400 and 245 differ by 155, you know you're only four away. So you try 398 and 247 and there you are.

Q: How did you get the answer for what 2 numbers have a sum of 645 and a difference of 151?

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Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).

445

The sum is 150*151/2 = 11,325

Difference. A sum is the result of adding two numbers, and a difference is the result of subtracting two numbers.

Two numbers with a sum of 4 and a difference of 9 are -6.5 and 2.5.

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645 - 151 = 494 494 / 2 = 247 247 + 151 = 398 Which means: 398 + 247 = 645 and 398 - 247 = 151

398 and 247.

247 + 398 = 645398 - 247 = 151Therefore the two numbers which add together to make 645 and have a difference of 151 are 247 and 398.

a + b = 645 a - b = 151 Add: 2a = 796 a= 398, making b = 247

Let the two numbers be represented by 'a' and 'b'. Then, a + b = 645 And a - b = 151............adding these two eqations together gives :- 2a = 796 : a = 398..........and b = 645 - 398 = 247 (or b = 398 - 151 = 247).

445

The sum is 150*151/2 = 11,325

Sum means adding so the sum is 645 + 10 = 655. Hope it helped!

The difference of 2 numbers is 32 the sum is 158 what are the 2 numbers?

The difference of two numbers is 8. Their sum is 22. What are the two numbers?

Difference. A sum is the result of adding two numbers, and a difference is the result of subtracting two numbers.

Two numbers with a sum of 4 and a difference of 9 are -6.5 and 2.5.