You can add and subtract decimal numbers in the same way as whole numbers using place value charts. You can put the digits of each number into columns according to their place value, then subtract ...

But, how your child learns to understand addition and subtraction is very important. The place value chart teaches your child why the standard algorithm works. How powerful!

Understand place value ... nine”). Use “tens” and “ones” to explain the meaning of a two-digit number (“79 is seven tens, and nine ones). Mentally add 10 and subtract 10 from any ...

Today we focus on using the expanded form of the numbers to solve. Julia uses her chart and white board examples to solve the addition and subtraction problems in a fact family. / Julia Knarr ...