-10
-20 -(-5) = -15 ie -(-5) = +5 therefore -20 +5 =15 (two double minuses = a positive)
5, as 20x0.75=15, so 20-15=5
9 - 20 / 4 + 16 = 9 - 5 + 16 = 20
16/20 - 5/20 = 11/20
5 - (-15) = 20
make lower number the same 4/5 = 16/20 3/4 = 15/20 16/20 - 15/20 = 1/20
-10
-20 -(-5) = -15 ie -(-5) = +5 therefore -20 +5 =15 (two double minuses = a positive)
5, as 20x0.75=15, so 20-15=5
Negative 15 plus positive 20 equals 20 minus 15, which equals 5.
9 - 20 / 4 + 16 = 9 - 5 + 16 = 20
16/20 - 5/20 = 11/20
15/16 - 3/8 = 21/16 - 6/16 = 15/16
It is: 5/12 minus 3/20 = 4/15
3/5 - 3/4 = 12/20 - 15/20 = (12 - 15)/20 = -3/20
Converting to twentieths, we get 8 over 20 minus 15 over 20, resulting in minus 7 over 20.