Sixth Grade
Lesson 50 (!) - We are cruising along in 6th grade math. I'm very pleased at the progress! Today, the lesson is about rounding in decimal numbers. Remember, to round any number, you underline the place value you are supposed to round to, then look at the number on the right. If that number is 5 or greater, the underlined number goes up one. If it is 4 or less, the underlined number stays the same. If this is all taking place after a decimal point, all numbers to the right of the underlined number go away.
Seventh Grade
Spelling - Be sure to finish Unit 15 by Friday!
Vocabulary - Test over Unit 7 tomorrow. Be sure you are studying. (I noticed a LOT of vocabulary books were left at school...hmmm)
Literature - Read the rest of chapter 23 of Treasure Island and read chapter 24.
Math - Scientific Notation with very small numbers.
To change a standard number that is very small (such as 0.000034) into scientific notation, follow these steps:
1. Place the decimal point after the first non-zero number from the left so that your new number is 1 or greater but less than 10.
In the example above, you would have 3.4
2. Write x 10 after this number. (You will ALWAYS have x 10 in scientific notation)
Now you have 3.4 x 10
3. You need an exponent with the 10. To determine this, count how many decimal places you moved your number to the right. Write that as a negative number as your exponent. In the above example, the decimal moves over 5 places to the right - that would be -5.
So, the final answer would be 3.4 x 10 to the -5th power. (Write the -5 as an exponent above the 10. I can't type that in my blogging program.)
To change a very small number that is already in scientific notation into a standard number, you are going to do the opposite.
1. Move the decimal point to the left however many places indicated by the exponent of 10.
2. That's it!
So, if the number is 3.42 x 10 to the negative 7th power, you would move the decimal 7 places to the left. Moving it past the 3 would be the first place, so you would then have to move it 6 more places over. You would have to add 6 zeroes before putting the decimal point. The answer would be 0.000000342
The assignment is the 20 problems that were written on the mimio board.
Eighth Grade
Practice with multi-step equations - 15 problems. There are examples in past blog posts. Please scroll back or click through the archives. Remember, there will be a quiz tomorrow over these kinds of problems!
See you tomorrow!
Mrs. Swickey
