Calculate 505 - 20.3: Decimal Subtraction in Vertical Format

Question

50520.3-

Video Solution

Solution Steps

00:00 Solve
00:03 Place 0 in the missing digits, we'll position the decimal point
00:07 We'll start subtracting from right to left
00:10 The digit is too small for subtraction, so we'll borrow from the next one
00:14 The next digit will decrease by 1, and our digit will increase by 10
00:22 Now we'll subtract from the larger number
00:27 Calculate and place accordingly
00:31 Continue subtracting, calculating, and placing accordingly
00:38 Again the digit is too small for subtraction, so we'll borrow from the next one
00:42 We'll use the same method
00:56 Calculate and place accordingly
01:04 Continue subtracting, calculating, and placing accordingly
01:11 And this is the solution to the problem

Step-by-Step Solution

To solve this problem, we'll perform the subtraction 50520.3 505 - 20.3 step by step:

  • Step 1: Align the numbers
    Write 505.0 505.0 with a zero added in the tenths place for alignment:
    505.020.3 \begin{array}{c} 505.0 \\ - 20.3 \\ \hline \end{array}
  • Step 2: Perform the subtraction
    Start from the rightmost digit:
    • Tenths column: 03 0 - 3 cannot be done directly, so we borrow 1 from the units column, making it 103=7 10 - 3 = 7 .
    • Units column: Now 52=3 5 - 2 = 3 , after borrowing 1 1 .
    • Tens column: 102=8 10 - 2 = 8 because we've borrowed 1 earlier adding to the initial 0, leaving the column value as 4 from the hundreds place.
    • Hundreds column: 40=4 4 - 0 = 4 , after handling the earlier borrow.

After calculating, the result of 50520.3 505 - 20.3 is therefore:

484.7 484.7

Thus, the solution to the problem is 484.7 484.7 .

Answer

484.7