Answer:
Step 1:
Start by setting it up with the divisor 15 on the left side and the dividend 123 on the right side like this:
15 ⟌123
Step 2:
The divisor (15) goes into the first digit of the dividend (1), 0 time(s). Therefore, put 0 on top:
0
15⟌123
Step 3:
Multiply the divisor by the result in the previous step (15 x 0 = 0) and write that answer below the dividend.
0
15⟌123
0
Step 4:
Subtract the result in the previous step from the first digit of the dividend (1 - 0 = 1) and write the answer below.
0
15⟌123
-0
1
Step 5:
Move down the 2nd digit of the dividend (2) like this:
0
15⟌123
0
12
Step 6:
The divisor (15) goes into the bottom number (12), 0 time(s). Therefore, put 0 on top:
00
15⟌123
-0
12
Step 7:
Multiply the divisor by the result in the previous step (15 x 0 = 0) and write that answer at the bottom:
00
15⟌123
-0
12
0
Step 8:
Subtract the result in the previous step from the number written above it. (12 - 0 = 12) and write the answer at the bottom.
00
15⟌123
-0
12
-0
12
Step 9:
Move down the last digit of the dividend (3) like this:
00
15⟌123
-0
12
-0
123
Step 10:
The divisor (15) goes into the bottom number (123), 8 time(s). Therefore put 8 on top:
008
15⟌123
-0
12
-0
123
Step 11:
Multiply the divisor by the result in the previous step (15 x 8 = 120) and write the answer at the bottom:
008
15⟌123
-0
12
-0
123
120
Step 12:
Subtract the result in the previous step from the number written above it. (123 - 120 = 3) and write the answer at the bottom.
008
15⟌123
-0
12
-0
123
-120
3
You are done, because there are no more digits to move down from the dividend.
The answer is the top number and the remainder is the bottom number.
Therefore, the answer to 123 divided by 15 calculated using Long Division is:
8 along with 3 remainers
