Multiplying Whole Numbers and Decimals

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Presentation transcript:

Multiplying Whole Numbers and Decimals

Do Now Take out homework Write the number, 234, 567, 981 in expanded form Add: 1.4982 + 12.56

S.W.B.A.T Multiply whole numbers and decimals

Multiply Single Digits Align the multiplier (Bottom) with the ones digit of the multiplicand (top) Multiply each digit of the multiplicand Write the ones digit of each product If there is a tens digit, carry it and add it to the next product 628 X 7

Multiply more than one digit Follow the same procedure for each digit 628 X 237

Writing, how do we multiply whole numbers? Write the multiplier under the multiplicand and draw a line. Multiply the multiplicand by each digit of the multiplier. Place the ones digit of each partial product in the same column as the multiplying digit. Then add the partial products

How do we multiply decimals? Ignore the decimal points Do NOT align them Multiply the numbers as if they were whole numbers Then, start from the right of the product, separate as many decimal digits as there are in the two numbers together

Practice Problems Work with your group on the worksheets I am going to hand out