kavitha_grade5 - Saturday, September 20, 2008 11:18:44 AM

This is a pretty good book. I will recommend a buy.

kavitha_grade5 - Saturday, September 20, 2008 11:19:57 AM

when you add many single digit numbers bucket them into 10s.

kavitha_grade5 - Saturday, September 20, 2008 11:22:17 AM

divisibility rules

by 3 if you add all digits and they are divisible by 3

by 4 if it is even and the last 2 digits are divisible by 4

by 5 if it ends in 0 or 5

by 6 if divisible by 3 and 2

kavitha_grade5 - Saturday, September 20, 2008 11:23:42 AM

Multiplying two large numbers

break them into factors. Start multiplying the largest factors first. Give an example for the kids.

kavitha_grade5 - Saturday, September 20, 2008 11:28:02 AM

multiplyinb by 5, 15, 20, 25 etc

multiply with a 10 or a multiple of 10 and half or double or triple

kavitha_grade5 - Saturday, September 20, 2008 11:32:59 AM

The story of check digits for addition, multplication, subtraction