Long+Division+-+by+a+1-digit+Number+(4th+Grade)

by Chris Pugh

=Standards= Math - CFU 0406.2.4Understand and use a reliable algorithm for multiplying multi-digit numbers and dividing numbers by a single-digit divisor accurately and efficiently.

ISTE NETS - **1.** **Creativity and Innovation** c. use models and simulations to explore complex systems and issues.

=Lesson= TSW...

They will need a **piece of paper** and **pencil** to work through the long division algorithm as we use the model to help them see what is happening with the numbers and build number sense within long division.
 * 1) Open Kidspiration 3.
 * 2) Click on the MATH button.
 * 3) Scroll down to the LONG DIVISION button, then click OK.
 * 4) Review single-digit number dividing into larger number with the 3 sample steps. Note the descriptions at the side of each step.
 * 5) Use the NEXT STEP button in the top toolbar to move down through the steps to step 4.
 * 6) At STEP 4, use the manipulatives to model the number inside the 2 groups. (On paper, simply write down the problem.)
 * 7) Click the ADD STEP TO END button [[image:Kid3-AddStep.jpg]] to copy the manipulatives to STEP 5.
 * 8) In STEP 5, use the BREAK APART button on the FLAT, or hundreds number model, since it cannot be divided as a whole hundred.
 * 9) In STEP 5, drag the RODS into each group box evenly to model dividing 13 by 2. (On paper, write the number of RODS in **only one** of the group boxes above the 3 at the top to show __**DIVIDE**__.)
 * 10) In STEP 5, count the number of RODS in **all** boxes. (On paper, write the number of RODS in **all** boxes below the 13 to show __**MULTIPLY**__.)
 * 11) In STEP 5, count the number of RODS **not in any** boxes. (On paper, write the number of RODS not in any boxes below the 2 in 12 to show __**SUBTRACT**__.)
 * 12) In STEP 5, click ADD STEP TO END button [[image:Kid3-AddStep.jpg]] to copy the manipulatives to STEP 6.
 * 13) In STEP 6, click on remaining ROD and the BREAK APART button to turn it into UNITS. (On paper, write the number of UNITS by bringing down the 4 beside the 1 to make 14 ones and show __**BRING DOWN**__.)
 * 14) In STEP 6, click and drag the UNITS to each group evenly to divide. (On paper, write the number of UNITS in **only one** of the group boxes above the number 4 at the top to show __**DIVIDE**__.)
 * 15) In STEP 6, count the number of UNITS in **all** boxes. (On paper, write the number of UNITS in **all** boxes below the 14 to show __**MULTIPLY**__.)
 * 16) In STEP 6, count the number of UNITS **not in any** boxes. (On paper, write the number of UNITS **not in any boxes** below the 4 in 14 to show __**SUBTRACT**__.)
 * 17) Click FILE and PRINT.
 * 18) On a Mac, click the drop-down menu labeled COPIES AND PAGES. Select the LAYOUT choice from the drop-down menu.
 * 19) Click the drop-down menu beside PAGES per SHEET to change from 1 to 4 pages per sheet.
 * 20) Click blue PRINT button.