Sixth Grade
The class took a test today and started the next lesson. Lesson 27 will be due tomorrow. Be sure to use your fraction pieces!
Seventh Grade
We continued with ITBS testing this morning. Spelling Unit 8 is due on Friday. Also, in Vocabulary, we discussed some of the words. For homework, write 10 sentences using 10 of the words from the list. Cards will be due on Monday and the unit will be due on Tuesday.
Eighth Grade
Lesson 2-3 #2-50 Evens.
Did you take your sourcebook home to use the square root tables in the back? If you forgot, go to this site. There are squares and square roots up to 100.
The first section is squaring the numbers. Remember, to square a number, you simply multiply it by itself. So, if the problem was -1.5, you would multiply (-1.5)(-1.5) = 2.25 There is no negative square of any number! For the scientific notation problems, you will square the first number in the same manner just described, then square the power of 10 by multiplying the exponent by 2. Here is an example:
Above, the first thing you do is square 3.5 = 12.25, then square the power of 10 by multiplying -3 by 2 to get -6. The last step is to examine the answer to see if it is in scientific notation. Because 12.25 has two numbers before the decimal, it is NOT in scientific notation yet. Move the decimal point one place to the left and ADD 1 to the exponent. -6 + 1 = -5.To find square roots, you can use the table in the back of the book or from the website above. To use the table for this problem:
To use the table, look down the list of square ROOTS. (It's the second column), until you get to 729. You can see that the number 27 is the square root of 729. Since the above problem is a decimal with four places after the decimal, to write the answer, move the decimal TWO places over (exactly half the number of decimal places under the square root sign.) So, the square root of .0729 is 0.27. The problem wanted the NEGATIVE root of 0.0729, so the answer would be -0.27. (Since the negative sign is on the outside of the radical, it is fine...just write it with your answer.)To simplify a fraction, you just find the square root of both the numerator and the denominator. When simplifying an expression using order of operations, simplify radicals at the same time that you would simplify exponents.
See you tomorrow!
Mrs. Swickey
