6th grade homework due Thursday March 7th, 2013
The following homework is for all of you to review operations with integers and decimals. Remember that in Math it is very important that you practice at all times. I know you can all do great!
Rules for operations with integers:
* Multiplying and dividing: Same sign is ALWAYS POSITIVE/ Different signs is ALWAYS NEGATIVE
* Adding and subtracting: Same sign, I keep the sign and I add the absolute value/ Different signs, I subtract the absolute value and keep the sign of the integer with the greatest absolute value
Rules for operations with decimals:
* Adding and subtracting: I must arrange my decimals matching the decimal point, and keep the decimal point in the same place in my result.
* Multiplying: Multiply as you always do. At the end, count the number of decimal places you have in your factors and then move the decimal point as many times in your product.
* Dividing: remember you divisor CANNOT be a decimal.
Exercises:
Simplify:
a) 23.68 / 6.4 (Division)
b) 0.54 + 0.027
c) 4.6 - 3.87
d) 2.7 x 6.25
e) At a grocery store, you buy hamburger weighing 1.42lb, sausage weighing 2.16lb, and chicken weighing 3.73lb. How many pounds of meat did you buy? If each pound costs $0.56, how much money would you spend?
a) 14 + (-8)
b) 17 - (-12)
c) -5(6)
d) 125/(-5) (Division)
e)You earn $5.25 an hour at your job in a restaurant but pay for any food you eat. On Friday, you receive a check for 7 hours of work, minus $8.90 for food. What is the amount on your check?
Have a great afternoon!
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