Please Note: this material was created for use in a classroom, but can be easily modified for homeschooling use.
To help students compare the value of decimals, propose situations such as these:
- The fastest known fish, the cosmopolitan sailfish, swims up to 67.92 miles per hour; the fastest mammal, the cheetah, runs across the plains at up to 67.912 miles per hour. Which animal is faster? (sailfish)
- A garden snail can journey at 0.03 miles per hour; a three-toed sloth can travel at 0.15 miles per hour; and a tortoise can move up to 0.280 miles per hour. Order the animals from fastest to slowest. (tortoise, three-toed sloth, garden snail)
- Free-tailed bats have been clocked at 32.41 miles per hour. If a tropical cockroach moves at speeds up to 3.241 miles per hour, how many times faster is the bat? (10 times faster)
- Killer whales swim at 34.53 miles per hour in the eastern Pacific. Is this faster or slower than a nearby cruise ship moving at 34.55 miles per hour? (slower)
- If a tortoise travels at 0.17 miles per hour and a spider moves at 1.17 miles per hour, how much faster is the spider? (one mile per hour faster)
- A dolphin can swim at 30.55 miles per hour, a giraffe can travel 30.7 miles per hour, a domestic cat can run 30.21 miles per hour, and a grizzly bear can travel at 30.1 miles per hour. Order the animals from slowest to fastest. (grizzly bear, domestic cat, dolphin, giraffe)