Quiz Multiplying Decimals Show All Work

Quiz Multiplying Decimals

SHOW ALL WORK

Remember: Do NOT line up the decimals. Instead, count how many digits are behind a decimal point in the two factors (the two numbers being multiplied together). Then make sure the same number of digits is behind the decimal point in the product (the final answer). If two letters are smushed together, multiply the numbers they represent together. Example: Find xy if x = 3 and y = 4. 3 × 4 = 12 Correct This does NOT mean 34 and it does NOT mean 3 + 4 = 7. 1. 82.7 × 8

2.

4.16 ×

7.3 (Always multiply up and down, not across).

Dividing decimals by a whole number. SHOW ALL WORK Remember: Bring the decimal point straight up. Follow these steps: Dad ÷ Mom × Sister – Brother Bring down 3.

_____________ 7) 45.78

Dividing decimals by decimals.

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Remember: _________ divisor ) dividend Scoot the decimal point in the divisor over to the right until it is behind the last digit. Count how many places you had to scoot it over. Now, move the decimal point in the dividend the same number of spots to the right. Then, bring the decimal point in the dividend straight up. Rewrite the problem so you can eliminate all the clutter. _______ 4. 0.6) 57.84

_________ 5. 1.4) 3.29

6. Bonus question (5 pts.) 93.912 ÷ 4.3