80 - 70% = 80 x (1 - (70/100)) = 24
70 minus 64 is 6.
-30 - (-24) = -30 + 24 = -6
44 -24 20 ==== Starting the right hand column, we say '4' take away ;4; leaves nothing '0' , so '0' in the right hand column Then next column to the left. , we say '4' take away '2' , and you are left with '2', so '2' in the answer. So the answer becomes '20'. (twenty).
64 minus 24 is 40.
140 minus 70 is 70.
170 - 70 = 100
70 - 1 = 69
112-70= 42
90 - 70 = 20
-70 - 60 = -130
It is: 870-70 = 800