Missing Factor
20 X __ = 160
8
Solve 12 X 62 using area model
744
Solve 22 X 33 using the distributive property
23 X 33
(20 + 2) X (30 + 3)
(20 X 30) + (20 X 3) + (30 X 2) + (3 X 2)
600 + 60 + 60 + 6
726
10 X 80
800
Estimate the product of 12 X 56 using rounding
10 X 60 = 600
30 X __ = 2,100
70
Solve 19 X 44 using area model
836
Solve 46 X 54 using the distributive property
46 X 54
(40 + 6) + (50 X 4)
(40 X 50) + (40 X 4) + (50 X 6) + (6 X 4)
2000 + 160 + 300 + 24
2484
19 X 32
608
Estimate the product of 28 X 72 using rounding.
30 X 70 = 2,100
40 X __ = 20,000
500
Solve 26 X 75 using area model
1,950
Solve 67 X 67 using the distributive property
67 X 67
(60 + 7) X (60 + 7)
(60 X 60) + (60 X 7) + (7 X 60) + (7 X 7)
3600 + 420 + 420 + 49
4489
2795
Estimate the product of 45 X 92 using rounding.
50 X 90 = 4,500
900 X __ = 81,000
90
Solve 25 X 78 using area model
1950
Solve 85 X 29 using the distributive property
85 X 29
(80 + 5) X (20 + 9)
(80 X 20) + (80 X 9) + (20 X 5) + (5 X 9)
1600 + 720 + 100 + 45
2465
55 X 77
4235
Estimate the product of 87 X 61 using rounding.
90 X 60 = 5,400
12 X __ = 144,000
12,000
Solve 39 X 89 using area model
3,471
Solve 12 X 89 using the distributive property
12 X 89
(10 + 2) X (80 + 9)
(10 X 80) + (10 X 9) + (80 X 2) + (2 X 9)
800 + 90 + 160 + 18
1098
98 X 21
2058
Estimate the product of 121 X 76 using rounding.
120 X 80 = 9,600