Using known Facts to Find Unknown Facts. You can use breaking apart to find a product. Find 4 x 5.
example: 4 x 5= 2x5+2x5
=10 + 10
=20
2 answers
Yes!
How can you use 4 facts to find 7x8 ?
example: 4 x 5= 2x5+2x5
=10 + 10
=20
2 answers
1 answer
0 answers
1 answer
4 answers