Lesson 1

Lin’s bike travels 100 meters when her wheels rotate 55 times. What is the circumference of her wheels? Solution. About 1.82 meters because 100÷55≈1.82. Problem 5 (from Unit 3, Lesson 3) Find the circumference of this circle. Solution. About 47 cm because 15⋅π≈47. Problem 6 (from Unit 3, Lesson 3) ................
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