Unit 11 Contents

1. Jackie solved the problem 47 52 using the all-partials method. Then she tried using the
   compact method.


1. How did Jackie get 160 in the third partial product of the all-partials method?
2. How did Jackie get 2000 in the last partial product of the all-partials method?
3. Why did Jackie place a 1 above the problem in the compact method?
4. How did Jackie get a 6 in the tens place in the second partial product in the compact method?
5. Where is Jackie's record of multiplying 7 50 in the compact method?
6. How did Jackie get 2160 when using the compact method?
2. Look at the partial products below. If you use the all-partials method for 27 69, which four partial products will you multiply?
   

   6 20	60 7	2 90	9 7
   60 20	90 20	20 7	9 20

3. If you use expanded form to multiply 71 38, which of the four partial products below will
   you multiply?

3 10	8 70	30 70	80 7
30 7	30 1	1 30	8 1

Find the following products using mental math or any paper-and-pencil method. Estimate to be sure your answers are reasonable.

4. 25 15 =
5. 46 34 =
6. 58 76 =
7. 95 64 =

8. 70 23 =
9. 68 90 =
10. 52 55 =
11. 76 33 =