-60
21
You can subtract 2 from 21 a total of 10 times. This is because each time you subtract 2, you are left with 19, and you can repeat the process until you reach 1. Mathematically, this can be represented as 21 - 2 = 19, 19 - 2 = 17, and so on until you reach 1.
10 times
0.0167
21/60 - 1/15 = 17/60 To subtract fractions, make them have the same denominator (bottom number) by converting them to equivalent fractions (usually with the lowest common multiple of the denominators) and then subtract the numerators (top numbers). So for 21/60 - 1/15: lcm(15, 60) = 60: 21/60 = 21/60 1/15 = 4/60 ⇒ 21/60 - 1/15 = 21/60 - 4/60 = 17/60
-60
50.3625 in DMS form is 50.21.45 50 is the D part. Subtract 50 to get 0.3625. Multiply by 60 to get 21.75. 21 is the M part. Subtract 21 to get 0.75. Multiply by 60 to get 45. 45 is the S part.
Only once, because after that you do not have 60 to subtract from!
The inverse operation of adding 21 is subtracting 21. This means that if you subtract 21 from a number, and then add 21 to the result, you will get back to the original number.
21
You can subtract 2 from 21 a total of 10 times. This is because each time you subtract 2, you are left with 19, and you can repeat the process until you reach 1. Mathematically, this can be represented as 21 - 2 = 19, 19 - 2 = 17, and so on until you reach 1.
54
23
100 - 21 = 79
29
0.35