Question

Determine the answer to 3 + (−5) and explain the steps using a number line.

Answer 1

what are you having trouble with?

Answer 2

i dont really understand how to find the answer

Answer 3

I think this wants to show you how a negative number moves left and positive to the right...so..

plus a negative number is the same as just subtraction
3 - 5

Answer 4

it is saying +(move right) by (-5) which itself moves left

Answer 5

yea i know 3+(-5)= 3-5, but i still cant get the answer

Answer 6

so what your saying is go right 3 times and then lest 5

Answer 7

because i thought that was how u do it but i was confused

Answer 8

No its a negative

Answer 9

no just remember,

a + (-b) = a - b plus a negative is subtraction

Answer 10

so is the answer -2

Answer 11

if you add a negative number to a value on the numberline, you move left, same as if you just had subtracted it

Answer 12

the other one is minus a negative number, same as just addition

a - (-b) = a + b

Answer 13

i really need to get a good grade on this test. i did the number line and went from 0 to 3 then i went left 5 times and i got -2

Answer 14

is that the right answer?

Answer 15

oh number line... forgot

Answer 16

3 + (−5)

start at 3, move left 5 to -2

Answer 17

so then i got the correct answer?

Answer 18

i dont get that

Answer 19

i started at 0 and went right till i got to the number 3. then i went left 5 times but started at 3 instead of 0 and i got -2. Is this right or wrong?

Answer 20

the upper one is just showing the distance between 3 and -2, not sure what you have to include on your graph

Answer 21

just explain how to get the answer... or how u got the answer using the number line

Answer 22

the explanation that i said earlier was it right or wrong

Answer 23

oh they want you to start at zero? then to show 3 - 5 = -2 ...

start at zero, move +3, then move -5, end on -2

Answer 24

thank you. i really needed to make sure i had the right answer

Answer 25

can you help me with something else?

Answer 26

sure, i have a couple min

Answer 27

ok

Answer 28

Andrew is showing his work in simplifying −4.5 + 4.2 + 5.6 − 7.3. Identify any errors in his work or in his reasoning. Write feedback to Andrew explaining the mistake he made and how to correct his work.


Step Work Reasoning
−4.5 + 4.2 + 5.6 − 7.3 Original problem
1 −4.5 + 4.2 + 5.6 + (−7.3) Additive inverse
2 −4.5 + (−7.3) + 4.2 + 5.6 Commutative property
3 (−4.5 + (−7.3)) + (4.2 + 5.6) Associative property
4 −11.8 + 9.8 Simplify
5 −21.6 Simplify

Answer 29

k..

Answer 30

in the original problem the 7.3 is positive, why in 1. he wrote it was negative

Answer 31

The 7.3 is negative in the original

Answer 32

the only thing i see is in the simplifying step

Answer 33

-11.8 + 9.8 = -2 not what he wrote -21.6