77 + 28 of 2 − 36 + 44 ÷ 4 + (13 × 2) − 21= ?
Show answer & explanation
Correct answer: C
Explanation
77 + 28 of 2 − 36 + 44 ÷ 4 + (13 × 2) − 21
77 + 56 − 36 + 11 + 26 − 21
= 133 − 36 + 11 + 26 − 21
= 97 + 11 + 26 − 21
= 108 + 26 − 21
= 134 − 21
= 113