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Wednesday, November 9, 2011

Jomer's Textbook Question

2.2 Question 16

Bella is more comfortable working with integers than with positive and negative decimal numbers. This is her way of understanding -4.3 + 2.5.

-4.3 is -43/10 or -43 tenths.

2.5 is 25/10 or 25 tenths.

-43 tenths + 25 tenths is -18 tenths

-18 tenths is -18/10 or -1.8

so, -4.3 + 2.5 = -1.8

A)
Use Bella's method to determine 6.1 + (-3.9).

(+)(-) = negative

6.1 + (-3.9)

6.1 is 61/10 or 61 tenths.

-3.9 is -39/10 or -39 tenths

61 tenths + (-39 tenths) = 22 tenths

6.1 + (-3.9) = 2.2


B)
Instead of tenths, it's hundredths.

1.25 - 3.46

1.25 is 125/100 or 125 hundredths.

3.46 is 346/100 or 346 hundredths

125 hundredths - 346 hundredths = (- 221 hundredths)

1.25- 3.46 = (-2.21)

3 comments:

  1. Good job Jomer! Your post is very understandable and neat. I also liked how you tried to make the important words to stand out. Next time try explaining how you got from a decimal number into a fraction. Also, next time try not using a lot of space. Overall, your post is great!

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  2. Good job Jomer. Your post was written nicely and easy to understand. I thought it was cool how you made important words noticeable!

    ReplyDelete
  3. Great Job Jomer! Your post is very neat and organized. I also like how you made important words stand out. Next time I suggest more pictures. Other than that, great post!

    ReplyDelete