What is $3- 4.2 - (-2.2$ )?

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Answer 1 · 2016-04-09T18:16:55

$3- 4.2 - (-2.2) = 1$

$3- 4.2 - (-2.2)$ $" "$ I would first get rid of the double negative

$= 3- 4.2 + 2.2$ . $" "$ Now do addition and subtraction from left to right.

$= -1.2 + 2.2 = 1$ .

Note

Sometimes it is easier to add all the positive numbers, add all the negatives and then finish.

For example $5-2+8+3-7-4$ .
The positives are $5+8+3 = 16$ and
the negatives are: $-2-7-4 = -13$

So $5-2+8+3-7-4 = 16-13=3$ .

What is 3- 4.2 - (-2.23- 4.2 - (-2.2)?