Games and Exploration: Sums Greater Than Ten

GAMES AND EXPLORATION USING BEAD BARS

d. Sums Greater Than Ten

Materials: same as above

Presentation:
As before, the child combines two or more numbers, whose sum will be greater than ten. The colored bead bar is placed below the ten bar to facilitate counting.
For example:

A child chooses 14 and 12 in beads to add. Tell the child to add the units first and then the tens to achieve the sum. 4 + 2 = 6 and 2 tens are twenty. The sum is 26.

The child chooses 18 + 25 in beads. Again units are added first. Since that sum is 13. Place a three bar below and carry the one ten mentally. Carrying the one ten add the other tens. The sum is 4 tens and the total sum is 43. This exercise gives a child experience with horizontal as well as vertical addition, a fact often overlooked in preparation for standardized tests.

Command cards may be made. The chart may be used as control.

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