4-1
30 X 40
1200
Draw and area model to find 20 x 26
420
Split 20 into 10 + 10
Split 26 into 20 + 6
Estimate product
39 x 19
800
Draw an area model to find product
41 x 12
Teacher will check
492
34x51
1734
500 X 3
1500
10 x 22
220
22 into 20 + 2
Estimate the product
28 x 27
900
Draw an area for each product
29x 50
1,450
Teacher will check the array
19 x 52
988
40 x 600
24,000
20 x 35
700
Split 30 into 30 + 5
Estimate each product 66 x 41
2,800
Draw an area for product
22x88
1,936
Teacher will check the array
38 x 17
646
10 x 1600
16,000
Which is greater 15 x 30 or 22 x 20
30 x 15
Estimate the product
34 x 52
1,500
Draw an area model to find product
58 x 19
1,102
Teacher will check the array
73 x 81
5,913
240,000 x 200
48,000,000
Draw an array to find the product of 40 x 21
Teacher will check
Select all of the expressions that could be used to estimate 32 x 14
30x10
30x20
14x32
32x10
30x10
32x10
Select all the partial products to find 19x26
45; 60;180;200
200;180;60;54
6;45;180;200
200;60;180;54
200;180;60;54
200;60;180;54
26 x 53
1,378