Pre-Algrebra 6 5 & 6 6a
View more documents from Kathy Favazza.
Wednesday, March 31, 2010
Sunday, March 28, 2010
Percents
On Friday in math class we worked on percents into decimals, percents into fractions, decimals into percents, and percents into mixed numbers too. Somethings we did to practice were problems like write 30% as a fraction in simplest form which would be 3/10. Another problem would be for us to figure out what 6.35% would be in decimal form. The answer would be 0.0635. The way to figure this out is 6.35 divided by 100 which would eaqual on a calculator 0.0635. Or an easier way of doing this is to move the decimal point in 6.35 over backwards two spaces because its divide by 100. We did many prolems like the ones shown in this paragraph. some where confusing like the problem with 6.35% into a decimal. This is what we did on Friday in class.
Krystle T.
Krystle T.
Thursday, March 11, 2010
Thursday, March 11th
Today in math class we worked more with proportions. In our groups, we completed problem 4.3. To solve proportions, all you have to do is make equivalent fractions. For example, to solve the enchiladas problem you would make two fractions, 3/705=240/x. Then all you need to do is find the variable, x. To find it, you figure out what makes the equation true. We did 240/3=80, and then 705x80= 56,400 calories. Then they make equivalent fractions.
Tuesday, March 9, 2010
Today in Math class we worked on problem 4.2 in Comparing and Scaling. This problem involved applications for proportions. An example of this is "Jogging 5 miles burns about 500 calories. How many miles will Tanisha need to jog to burn off the 1,200-Calorie lunch she ate?" We also had to come up with a proportion for every problem we solved. A proportion for this problem is 5/x miles=500/1,200 calories, X=12. In this proportion, x was how many miles Tanisha would need to run in order to burn the calories. This proportion shows the relationship between calories burned, and miles run. It shows that the relation ship is that about 100 times as much calories are burned than the miles run, in the problem it was 5 miles burns 500 calories.
Thursday, March 4, 2010
Tuesday, March 2, 2010
Math Class March 2 2010
Today in math we worked in groups on the Math Reflections. The problems compared peppers and their prices. We had to find the unit rates. To find the price per pepper you would divide $1.50 by 3. To find how many peppers per dollar you would divide 3 by $1.50. We also had to make an equation to show the price for a number of peppers. N*.50=P
Monday, March 1, 2010
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