Mult facts
12 x 7
84
What goes in the ?
5. 10. 100
------------------------------
10 20 ?
200
In 35 x
40...
The partial products would be
0 x 5
0 X 3
40 x 5 and....
40 X 30
The algorithm goes
top to bottom or bottom to top?
bottom to top
90
9 x 8
72
What goes in the ? 25 x 5
1. 10. 5
_____________________
25. 250. ?
125
in 25
x 38 partial products are
20 x 30, 30 x 5, 8 x 5 and
20 x 8
The algorithm goes from
left to right or
right to left
right to left
40 x 9
360
12 x 9
96
What goes in the ? 38 x 14
38. 380. 76. 132. ?
1. 10. 2. 4 14
512
in the problem 65 x
39 the partial products are
9 x 5
60 x 9
30 x 60 and
30 x 5
in 25 x
24
the first numbers I would multiply are
4 x 5
20 x 30
600
12 x 11
132
What goes in the ? 135 x 12
1. 2. 10. 12
_________________________
135 270. 1350. ?
1, 620
In the problem 99 x
99 the partial products are
9 x 9, 90 x 90, 90 x 9 and..
9 x 90
In 25 x
24
the 2nd numbers I would multiply are
4 x 20
40 x 50
2000
12 x 12
144
1. 10. 20. 30. 29
________________________
29. 290. 580. 870. ?
841
97 x 36
90 x 30, 70 x 3, 6 x 7, 30 x 7
70 x 3
in 25 x
24 the last thing I would multiply is
20 x 20
100 x 50
5000