Bead Bars: Sums greater than Ten

Age
4-6

Materials

 * Ten bars
 * Colored bead bars
 * Box of signs for operations

Preparation
Command cards may be made.

Presentation

 * 1) The child combines two or more numbers, whose sum will be greater than ten.
 * 2) The colored bead bar is placed below the ten bar to facilitate counting.
 * 3) For example:A child chooses 14 and 12 in beads to add.
 * 4) Tell the child to add the units first and then the tens to achieve the sum: 4 + 2 = 6 and 2 tens are twenty.
 * 5) The sum is 26.
 * 6) The child chooses 18 + 25 in beads.
 * 7) Again units are added first. Since that sum is 13.
 * 8) Place a three bar below and carry the one ten mentally.
 * 9) Carrying the one ten add the other tens.
 * 10) The sum is 4 tens and the total sum is 43.

Control Of Error
The chart.

Purpose

 * To give a child experience with horizontal as well as vertical addition.