Find the missing digits.
- R
- S
R128 - 23S5 = 6763(a)
In the hundreds place, 1 is less than 3.
So, there is regrouping in the thousands place.
R - 1 - 2 = 6
R = 6 + 2 + 1
R = 9
(b)
In the ones place, 8 is more than 5.
So, there is no regrouping in the tens place.
2 - S = 6
In the tens place, 6 is more than 2.
This means that there is a regrouping done in the hundreds place so that 12 can substract a certain number to get 6.
S = 12 - 6
S = 6
Answer(s): (a) 9; (b) 6
