Multiplication Lesson Topic Index | Grade 4 Math | Elementary Test Prep | StudyZone
 In a multiplication sentence, the numbers being multiplied are the factors; the answer is the product. 2 x 5 = 10 factors (2, 5) product (10)

 When groups are not equal, you add to find how many. 2 + 1 = 3 multiply: cannot When groups are  equal, you can add or  multiply. 2 + 2 = 4  or 2 x 2 = 4 Example: Not Equal Groups Serena bought 3 packages of batteries. Two packages had 2 batteries each. The third package had 3 batteries. How many batteries did Serena buy? Equal groups?  no Add: 2 + 2 + 3 = 7 Multiply: cannot Example: Equal Groups Kevin bought 3 packages of batteries. There were 2 batteries in each package. How many batteries did he buy? Equal groups?  yes Add: 2 + 2 + 2 = 6 Multiply: 3 x 2 = 6

When you put together equal groups, you an use repeated addition.

 4 + 4 = 8 2 rows of  4 equals 8 2 x 4 = 8   multiplication sentence

 Using counters with unequal groups. Equal groups?  no Add: 1 + 2 + 3 = 6 Multiply: cannot

 Remember: When you are putting together equal groups, you can add or multiply.

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