Description
first exercises 4+2[9+(-4+12)] second exercises 2^2-[3+9] third exercises 5^2-[10+(8)]
Explanation & Answer
4+2[9+(-4+12)] = 4 + 2[ 9 + 8 ] Do innermost brackets first
= 4 + 2 * (17) remaining brackets are calculated
= 4 + 34 multiplication before addition
= 38
second exercise 2^2- [3+9]
= 4 - 12 Do power and brackets
= -8
third exercises 5^2-[10+(8)] is like the second exercise
= 25 - 18 (Is it meant to be 8 or -8? if -8 then it would be 2 here)
=7
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