Dr. Dino asked Emek and Luna to organize fossils from different digging zones before updating the discovery map. Zone A had 8 groups of 5 fossils, and Zone B had 5 groups of 8 fossils. Emek noticed that both grouping strategies represented the same total of 40 fossils. After checking each collection with multiplication, they marked the map correctly. Their careful work revealed the complete fossil pattern and helped Dr. Dino choose the best place for the next excavation.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Multiply both expressions and compare the results.
Why did Emek know that Zone A and Zone B had the same total number of fossils?
Because 8 × 5 and 5 × 8 both equal 40.Because 8 + 5 = 40.Because 8 × 8 = 40.Because 5 × 5 = 40.Correct! Both multiplication expressions equal 40.
Try again. Calculate 8 × 5 and 5 × 8.
Next🎉 Congrats! You got this question!
Hint
Multiply the number of groups by the fossils in each group.
If Zone C has 4 groups of 5 fossils, how many fossils are in Zone C?
Correct! Zone C has 20 fossils.
Try again. Multiply 4 by 5.
Next🎉 Congrats! You got this question!
Hint
Compare the total fossils in each zone, not just one group.
A student says, "Zone B has more fossils than Zone A because it has more fossils in each group." Which answer is correct?
The student is correct because 8 is greater than 5.The student is incorrect because both zones have 40 fossils altogether.The student is correct because Zone B has more groups.The student is incorrect because Zone A has fewer groups.Correct! Both multiplication expressions give the same total of 40 fossils.
Try again. Find the total fossils in both zones before comparing.
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🎉 Congrats! You finished this challenge set!
