Question

Help please
Simplify 21 - ( -36) - 30

Answer 1

Hi :)

`\sim\star\sim\star\sim\star\sim\star\sim`

One of the rules for integer operations says that:

subtracting a negative is equivalent to adding a positive

∴

`\bf{21-(-36)=21+36}`

`\bf{21+36=57}`

Don't forget to take away 30

`\bf{57-30=27}`

27

`\sim\star\sim\star\sim\star\sim\star\sim`

Answer 2

Explanation:

`21 - ( - 36) - 30 \\ = 21 + 36 - 30 \\ = 27`