rgpatterson0122 rgpatterson0122

17-06-2016
Mathematics

Answered

Find the value of 21 - 18 ÷ 3 · 2.

2

9

18

Verified Answer :

Comontoya Comontoya

17-06-2016

order of operations (PEMDAS):
21 - 18 / 3 2
let's add some parenthesese to make it easier to see:
21 - (18 / 3 2)
multiplication and division are associative
also: 18 / 3 = 18 (1/3)
21 - (18 (1/3) 2)

21 - (62) or 21 - (36 (1/3)) or 21 - (18 (2/3))

21 - 12

9

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