Question

Which equations show that the set of whole numbers is closed under addition?

Choose all answers that are correct.

A.
0 + (–1) = –1

B.
1 + 1 = 2

C.
2 + 0 = 2

D.
2 + (–1) = 1

Answer 1

@AlexandervonHumboldt2

Answer 2

@freckles

Answer 3

@dtuniyants

Answer 4

yea I was gone invite him too but i didnt know his username lol

Answer 5

gona*

Answer 6

which of the outputs are whole numbers
and which choice has the addends as whole numbers?

Answer 7

for example is -1 a whole number?

Answer 8

no

Answer 9

yes

Answer 10

lol

Answer 11

so we don't care about choice 1 since -1 isn't a whole number
both of the addends have to be wholes numbers and the output also has to be a whole number

Answer 12

also i don't know what you are saying yes to?

Answer 13

whole numbers are {0,1,2,3,4,5,...}

Answer 14

ok lol nvm lol um yea

Answer 15

do you think choice 2 will work?

Answer 16

yes

Answer 17

ok because 1,1,2 are all whole numbers

Answer 18

what about choice 3 and 4?

Answer 19

btw this is a multiple chioce question so is it B and C?

Answer 20

yes B and C is right
all the addends are whole whole numbers and so is the sum in both cases

Answer 21

thx so much!