Intro multiplication
Download as PPTX, PDF
0 likes330 views
The document discusses multiplication and provides facts about it. Multiplication is defined as repeated addition. Some key properties of multiplication are that the order of factors does not matter, multiplying by 1 or a number by itself does not change the number, and the product is larger than the factors unless one is 0, 1, or negative. Multiples of 10 retain their number of zeros in the product. Multiplication can be shown visually with arrays.
Intro multiplication
- 1. Good Morning! What math process is being shown by the pictures to the left?
- 2. Facts about Multiplication Multiplication is the same as repeated addition Times means groups of You can reverse the order of the factors and the product stays the same (commutative property) A number x 1 stays the same (identity property) When you multiply 2 numbers the product is larger than the factors unless one of the factors is zero, one or negative. Any number multiplied by 0 equals zero (zero property) The number of 0s in the product is equal to the number of 0s in the factors, if they are multiples of 10
- 3. You can break the numbers apart to make the problem easier. A multiplication problem can be shown as a rectangular array