Author: Chaffin

ADDITION

SUBTRACTION

MULTIPLICATION

DIVISION

Stack the numbers,
lining up the decimal points.
Fill in with zeroes, if needed.

Add or subtract,
beginning at the far right.

Don’t forget to add the numbers you carried.

Remember: “If there’s more on the floor, go next door and borrow
ten more!”

“Top dog
goes in the house.”

Make the divisor a whole number by moving the decimal point to the right.

Move the decimal point in the dividend the same number of places to the right.

Decimal goes straight up into
the quotient.

Bring the decimal straight down into your sum or difference.

Count how many digits are to the right of the decimal(s) in both factors and have that many digits to the right of the decimal in your product.

To divide:
Divide, Multiply, Subtract,
Bring down

Multiply as you would without decimals, beginning at
the far right.

You should have a row for every digit on the bottom row, adding another
placeholder for each row.
(Ex.: Row 1 - 0 placeholders; Row 2 - 1 placeholder;
Row 3 - 2 placeholders, …)

Stack the numbers.