Unit Review: Multiplying whole numbers

D.1Multiply.

1. 1
   $700\times 80=$ 
2. 2
   $50\times 300=$ 

D.2Round each factor to its greatest place. Then multiply to estimate.

1. 3
   $795\times 48$
2. 4
   $456\times 89$

D.3D.4Multiply.

1. 5
   7808

   ×5
2. 6
   3042

   ×8
3. 7
   9020

   ×2
4. 8
   4076

   ×4
5. 9
   27

   ×90
6. 10
   20

   ×57
7. 11
   33

   ×71
8. 12
   28

   ×97

D.5D.6D.7Multiply. (continued)

1. 13
   344

   ×31
2. 14
   262

   ×83
3. 15
   557

   ×77
4. 16
   589

   ×66
5. 17
   7794

   ×77
6. 18
   2838

   ×97
7. 19
   2895

   ×77
8. 20
   9963

   ×59
9. 21
   504

   ×630
10. 22
    308

    ×383
11. 23
    404

    ×400
12. 24
    305

    ×768

D.8Fill in the missing number.

1. 25
   $(2\times 3)\times 3=$ $2\times (\boxed{}\times 3)$
2. 26
   $(3\times 2)\times 2=$ $3\times (\boxed{}\times 2)$

D.1Multiply Numbers Ending in Zeros

1. 156,000
2. 215,000

D.2Estimate Products

1. 3$800\times 50=40,000$
2. 4$500\times 90=45,000$

D.3D.4D.5D.6D.7Multiply.

1. 539,040
2. 624,336
3. 718,040
4. 816,304
5. 92,430
6. 101,140
7. 112,343
8. 122,716
9. 1310,664
10. 1421,746
11. 1542,889
12. 1638,874
13. 17600,138
14. 18275,286
15. 19222,915
16. 20587,817
17. 21317,520
18. 22117,964
19. 23161,600
20. 24234,240

D.8Properties of Multiplication

1. 253
2. 262