needmathhelp.com

From a grade 2 student...

Multiplication

When you multiply, you count. 2x5 means 5groups of 2 or 2 groups of 5. Multiply means groups of.

Subtracting
When you subtract, you take away. When you subtract the number, you use the sum, like this: 12-2 =10 or 12-10=2.

Adding
This is how you solve 23+45.
23-this plus
+45-this
=68-equals this
When you add, you add the ones column and add the tens column.