Mental Math
How can 9 x 5 help you solve 9 x 6 is?
5's facts are easy to memorize so I know 9 x 5 = 45. Then, I can just count up 9 more to get 9 x 6 = 54.
9 x 7 =
63
50 x 500 = 250,000
False, 25,000
371 x 26 =
9,646
The answers to a multiplication problem is called.
Product
How can 6 x 6 help you solve 6 x7 ?
6 x 6 is a doubles fact that I have memorized, so I know 6 x 6 = 36. Then, I can just count up 6 more to get 6 x 7 = 42.
12 x 7 =
84
70 x 800 = 5,6000
True
103 x 24 =
2,472
Numbers that are multiplied to give a product
Factors
3 groups of 9 will give you the same product as _____ groups of _______.
9 groups of 3.
6 x 9 =
54
4 x 500 = 200
False, 2,000
531 x 12 =
6,372
This property states changing the order of the factors does NOT change the product.
Commutative Property
3,495 people are attending a concert. They each payed $100 for their ticket. How much money did the concert make?
$349,500
8 x 4 =
32
600 x 700 = 460,000
False, 420,000
600 x 38 =
22,800
This property states the product of 1 and any number equals that number.
Identity Property
8 x ___ = 48
6
7 x 8 =
56
12 x 10 = 1,200
294 x 47 =
13,818
This property sates if 0 is multiplied by a number, the product is 0.
Zero Property