9514 1404 393
Answer:
$80
Explanation:
Add up the ticket costs:
$20 +20 +10 +10 +10 +10 = $80
It will cost $80 for the family to purchase tickets to the zoo.
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Many folks find it easier to use multiplication to simplify the addition:
2×$20 +4×10
= $40 +40 = $80