3 times 9 and 7 times 9.
7x9
9+9 and 9+9+9+9+9
Using multiplication 40 times 45 = 1800
They both cannot be
3 times 35 equals 105
7x9 is the multiplication fact that can be found using the arrays 2x9 and 5x9.
7x9
You can see that multiplication works both ways: 2x9=18 9x2=18 5x9=45 9x5=45 Arrays are also helpful in seeing the inverse relationship between multiplication and division.
The multiplication fact (singular, not plural 'facts') that can be found is 7x9 = 63. Using the arrays, a 2x9 array (2 rows of 9 items) and 5x9 array (5 rows of 9 items) is 63: 2x9 = 18 5x9 = 45 18 + 45 = 63
9+9 and 9+9+9+9+9
Some common multiplication strategies include the Latis Strategy, The Algebra Strategy, and the Stacking Strategy.
10 x 5?
9
Using multiplication 40 times 45 = 1800
They both cannot be
3 times 35 equals 105
It is equivalent to multiplying by the cube of that number.