18. 8 + 2 × 4 =
8 + 8 = 16
19. 21 - 12 ÷ 3 =
21 - 4 = 17
20. 7 + 16 ÷ 2 =
7 + 8 = 15
Step-by-step explanation:
MDAS rule
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Answers & Comments
18. 8 + 2 × 4 =
8 + 8 = 16
19. 21 - 12 ÷ 3 =
21 - 4 = 17
20. 7 + 16 ÷ 2 =
7 + 8 = 15
Step-by-step explanation:
MDAS rule