Which expression are equivalent to 5+4.2-(-3)?
5+(-4.2)-3
5-(-4.2)+3
5-4.2-3
5+(-4.2)-3
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To determine which expression is equivalent to 5+4.2-(-3), we can simplify each of the given expressions and compare the results.
1. 5+(-4.2)-3:
Start by simplifying -4.2:
-4.2 = -4.2
Now, add 5 to -4.2:
5 + (-4.2) = 0.8
Finally, subtract 3 from 0.8:
0.8 - 3 = -2.2
2. 5-(-4.2)+3:
Simplify -(-4.2) by changing the double negative to a positive:
-(-4.2) = 4.2
Next, subtract 4.2 from 5:
5 - 4.2 = 0.8
Finally, add 3 to 0.8:
0.8 + 3 = 3.8
3. 5-4.2-3:
Begin by subtracting 4.2 from 5:
5 - 4.2 = 0.8
Then, subtract 3 from 0.8:
0.8 - 3 = -2.2
4. 5+(-4.2)-3:
Start by simplifying -4.2:
-4.2 = -4.2
Now, add 5 to -4.2:
5 + (-4.2) = 0.8
Finally, subtract 3 from 0.8:
0.8 - 3 = -2.2
By comparing the results, we can see that expressions 1, 3, and 4 are equivalent to 5+4.2-(-3) and have the same value of -2.2. Therefore, the correct answer is:
1. 5+(-4.2)-3
3. 5-4.2-3
4. 5+(-4.2)-3
5 + 4.2 -( - 3 )= 5 + 4.2 + 3
5 -( -4.2 ) + 3 = 5 + 4.2 + 3