first, you do is line it up then you - down from the nuber
By actually doing the subtraction.
53.73
6
2a+5
2b
9 minus 7 = 2
minus a minus is plus, so it's -8 + 3, which is 3 - 8, or -5
1105 - 407 = 698
First factor 578 into prime factorization 578 = 2*17*17 = 2*17^2 So, √(578) = √(2 *17) = √(2)*17
Add 407 to 623 and you'll have your answer !... (It's more than a thousand !)
578
4423
6
2a+5
2b
=-401
3a - 2b
5x - 4x = x
9 minus 7 = 2