7 + 6 = 113 ---> 7+6=13 and 7-6=1 so write it 113
9 + 1 = 810 ---> 9+1=10 and 9-1=8 so write it 810
5 + 3 = 28 ---> 5+3=8 and 5-3=2 so write it 28
9 + 6 = 315 ---> 9+6=15 and 9-6=3 so write it 315
Then process in the same manner,
7 + 2 =? ----> 7+2=9 and 7-2=5 so you write it as 59! 59
800 + 10
19
59
810
510 + 810 = 1320
810 + 354 = 1164
810 + 103 = 913
If one hundred pennies equals one dollar, then 81,000 pennies equals 810 dollars.
9
3,410 :)
8 : 10 = 16 : 20
The answer = 3450