Question

Calculate 0.4 + 5.1 and round to the correct number of significant digits.


a.) 6

b.) 5.41

c.) 5

d.) 5.5

Answer 1

Any ideas?

Answer 2

Well I have no idea how to round significant digits. It's definently not 6 though.

Answer 3

Well, first add the two numbers and see what you get :)

Answer 4

$$\Huge 0.4 + 5.1=?$$

Answer 5

5.5

Answer 6

Since BOTH numbers you added are significant to the tenths place, your answer is significant to the tenths place

Answer 7

So it's 5?

Answer 8

Nope

Answer 9

Well this is helpful

Answer 10

What does the tenths decimal place mean to you?

Answer 11

Like the 1in 0.1?

Answer 12

Yes :) so both 0.4 and 5.1 are accurate to the 0.1 place so their sum will be also, right?