Question

estimate using compatible number

1.29+4.69+3.45+1.59

Answer 1

12

Answer 2

12?

Answer 3

1.3 + 4.7 + 3.5 + 1.6 = 11.1

Answer 4

u sure?

Answer 5

Rounded to the nearest 1/10th
The actual sum is shown below:
1.29 + 4.69 + 3.45 + 1.59 = 11.02

Answer 6

http://answers.yahoo.com/question/index?qid=20071001173916AAIk0jD

Answer 7

Compatible Numbers? Never heard of such an estimation procedure until this problem.
6+5 = 11 ?

Answer 8

its so hard to explain

Answer 9

I read the your yahoo site. My view is that to line up or manipulate the numbers so that they add up to factors of ten requires more mental energy than to just do the calculation bye hand. Do what you have to do to pass the class. In the real world you would use a hand held calculator.

Answer 10

im sure it is not to hard

Answer 11

its only grade 8 math

Answer 12

the trouble is that i dont really understand the technique

Answer 13

it would be 11

Answer 14

if you're supposed to get a whole number.