Addition with renaming using MENTAL MATH!

Addition with Renaming ... what is it?

Renaming is the process used to solve math problems when there are too many ones, tens, or hundreds. This process is also known as "regrouping" or "borrow and carrying."  Example: 14 + 7 =  When you add the numbers in the ones place you get 11 ones.  The 11 ones have to be "renamed" for 1 ten and 1 one.  Solving the problem continues by adding the tens place value etc.

Below are some suggestions to help your child use mental math to add with renaming.  Your child WILL learn the vertical algorithm, which is often easier to use (and typically the preferred method for solving this type of math problem).

TIPS (using example problem of 54 + 7 = )

- Count up by starting at 54 and counting 7 higher (55, 56, 57, 58, 59, 60, 61)

- Place value chart - use items such as pennies for 1s, dimes for 10s, and $1 for hundreds (make the number 54 with 5 dimes and 5 pennies.  Have your child add 7 pennies to the board to make 61.

 11 ones = 1 ten 1 one

- Solve using "jump roping" (adding the ones, then adding the tens).  They will start by adding the numbers in the ones place (4 + 7).  Your child should recognize that equals a double digit number and cannot go into the ones place.  They will write the answer (11) below the problem and add the tens in 57 (5 tens = 50).  The new problem would look something like this: 50 + 11 =.  Now it is a problem that can be solved by "jump roping" (adding the ones, then adding the tens).