Mathematics, 06.05.2021 14:20 zackcarlson9374

Devon is buying 3 greeting cards that cost $0.97 each. How can rounding be used to estimate the total cost of the cards? Since each card is about $1, the total cost is approximately 3 + 1 = $4.
Since each card is about $1, the total cost is approximately 3 × 1 = $3.
Since he is buying about 10 cards, the total cost is approximately 10 × 0.97 = $9.70.
Since he is buying about 10 cards, the total cost is approximately 10 + 0.97 = $10.97.

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Devon is buying 3 greeting cards that cost $0.97 each. How can rounding be used to estimate the tota...