LI: How to add decimals using algorithims
This week Group 1 have been learning about how to add decimals using algorithims. An example I could have is like 3.45 + 1.2. 1. Align the numbers vertically by the decimal pointLine up the decimals so that the tenths match with tenths, and ones match with ones. This shifts the numbers to the right or left, regardless of how many digits they have. 2. Add placeholder zeros (Optional but recommended)Add zeros to the right of the decimal point so both numbers have the same number of digits. This prevents careless column mistakes. 3. Add column by column from right to leftAdd the numbers in the rightmost column first: (5 + 0 = 5). 4. Continue adding the remaining columnsMove to the next column to the left: (4 + 2 = 6). Then, add the ones column: (3 + 1 = 4). 5. Drop the decimal point straight down. Place a decimal point in the final answer, directly aligned with the decimal points in the numbers you added. Key Rules: Never align by the right side: Unlike whole numbers, you should never align decimal numbers to the right-hand side. Whole numbers have hidden decimals: If you are adding a whole number to a decimal (e.g., (5 + 2.75), place a decimal point at the end of the whole number and add zeros as placeholders: (5.00 + 2.75). Regrouping (Carrying): If digits in a column add up to 10 or more, write down the last digit and carry the tens digit over to the next column to the left, exactly as you would with standard addition.