Tuesday, August 18, 2015

Multiplication as repeated addition

Here we have five groups, and each group has two elephants.
5 × 2 = 10
 
how many
groups
how many
in each group
We can solve
it by adding:
5
×
2
   =    
2 + 2 + 2 + 2 + 2 = 10
“Fivetimestwo elephantsis
ten elephants.”
Here there are three groups, and each group has four dogs.
3 × 4 = 12



 
how many
groups
how many
in each group
We can solve
it by adding:
3
×
4
   =    
4 + 4 + 4 = 12
“Threetimesfour dogsis
twelve dogs.”

No comments:

Post a Comment