Emek and Luna reached a canyon where part of a wooden bridge was damaged. Nearby, they found 7 bundles of 18 planks, giving them 126 planks altogether. The first damaged section needed 34 planks, the second needed 27, and the third needed 41. Emek and Luna added the amounts and found that the repairs required 102 planks. Then they subtracted 102 from 126 and found that 24 planks would remain. Knowing they had enough, they repaired all three sections and safely crossed the canyon.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
There are 7 equal groups of 18 planks.
Emek and Luna found 7 bundles with 18 planks in each bundle. Which calculation finds the total number of planks?
18 + 7 = 2518 - 7 = 1118 + 18 + 18 = 547 x 18 = 126Correct! Multiplying 7 by 18 gives 126 planks.
Try again. Think about the operation used to find the total in 7 equal groups of 18.
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Hint
First find how many planks the first two sections need. Then subtract that amount from 126.
The first two damaged sections need 34 and 27 planks. Emek and Luna have 126 planks altogether. After repairing these first two sections, how many planks will they have left?
Correct! They will have 65 planks left after repairing the first two sections.
Try again. Add 34 and 27 first, then subtract the result from 126.
Next🎉 Congrats! You got this question!
Hint
Compare the 65 planks they have left with the 41 planks needed for the third section.
After repairing the first two sections, Emek and Luna have 65 planks left. The third section needs 41 planks. Which statement correctly shows whether they can finish the repair?
No, because 65 - 41 = 14.Yes, because 65 - 41 = 24, so 24 planks will remain.No, because 41 is greater than 65.Yes, because 65 + 41 = 106, so 106 planks will remain.Correct! They have enough for the third section and will have 24 planks left.
Try again. Subtract the 41 planks needed from the 65 planks they have left.
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