Evaluate: -1.8 - 3.2 + 2.4
* if you could show me how you get to the answer that would help a lot thanks : )
2007-07-30 09:52:25 · 4 answers · asked by mathmakesmecrazy 1 in Science & Mathematics ➔ Mathematics
Because addition and subtraction are commutative, you can do this in any order you like. Might as well start by subtracting 1.8 from 2.4:
2.4 - 1.8 = 0.6
Now subtract 3.2 from 0.6 (if this is too hard, then subtract 0.6 from 3.2 and give it a negative sign):
0.6 - 3.2 = -(3.2 - 0.6) = -(2.6) = -2.6
2007-07-30 09:58:47 · answer #1 · answered by Anonymous · 2⤊ 0⤋
- 4 + 2.4 = - 1.6
Explanation (use number line):-
Start at 0
1.8 Left and then 3.2 left takes you to 5 left.
From there go 2.4 to the right.
This leaves you at 2.6 left of zero.
Answer is thus - 2.6
2007-07-30 17:43:26 · answer #2 · answered by Como 7 · 0⤊ 0⤋
-1.8-3.2= -5
-5+2.4= -2.6
2007-07-30 17:05:23 · answer #3 · answered by me 3 · 0⤊ 0⤋
u r still in school????????????????????
2007-07-30 17:16:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋