Unit 8 Contents

For Questions 28–30, solve the first multiplication problem using any method you choose. Then use estimation to decide where the decimal goes for each of the following problems. Write the products.

1. 24 63 =
2. 0.24 6.3 =
3. 24 0.63 =
4. 2.4 63 =
5. 0.24 0.63 =

1. 53 38 =
2. 0.53 3.8 =
3. 53 0.38 =
4. 5.3 38 =
5. 0.53 0.38 =

Check-In: Question 31

31. Solve the problems using any strategy. Use either Lee Yah's or Shannon's method for placing the decimal in the answer.
1. 3.4 0.4 =
2. 0.47 7.9 =
3. 0.003 0.8 =
4. 5.42 0.5 =

Play the Three in a Row game in the Student Activity Book for practice with estimating decimal products.