Find the missing digits.
C 1 9 2 - 3
D 7 9 = 4 2 1 3
- C
- D
| |
Thousands |
Hundreds |
Tens |
Ones |
| |
C = 8 |
1 |
9 |
2 |
| - |
3 |
D = 9 |
7 |
9 |
| |
4 |
2 |
1 |
3 |
(a)
Since 1 in the hundreds place is not enough to subtract 2, we need to regroup and borrow 1 from the thousands place.
So, we need to minus 1 from 8.
C - 1 - 3 = 4
1 + 3 + 4 =
8C =
8(b)
Since 1 in the hundreds place is not enough to subtract 2, we need to regroup and borrow 1 from the thousands place.
So, we can add 10 to 1 so that the sum 11 can be used to subtract 2.
10 + 1 -
D = 2
11 - 2 =
9D =
9 Answer(s): (a) 8; (b) 9
