90.
10 plus 20 plus 30plus 40 plus 50 equals 150 because 50 plus 40 equals 90 plus 30 =120+20= 140 then + 10 = 150
20 plus 20 equals 4020 plus 20 = 40
The total is 400.
Of course!
50 + 40 + 40 + 40 + 30 + 30 + 20 + 10 = 260
50 - 40 = 10 + 0
40/10 = 20/a 4= 20/a 20/4 = a a= 5
A number "m" plus 40 equals 60. Therefore, 60 minus 40 equals m. m therefore equals 20.
thirty plus 50 equals 80 it is quite simple. all you do is you just add 3 and 5 then add on the zero.
6000.......it's actually 5,100
thinking is amazing
These may help you answer your questions: 1, 2, 4, 5, 8, 10, 20 and 40.