Small Bead Frame: Multiplication with a One-Digit Multiplier
From wikisori
Contents
Age
6-7.
Materials
- Bbead frame
- Small form
Preparation
Presentation
- To isolate the difficulty of decomposing the multiplicand, we begin with a static multiplication.
- From then on the child will work with dynamic problems.
- 2321
x 3
Write the problem on the left side of the form. - The first thing we must do is to decompose the multiplicand.
- "There are how many units?" 1, write 1 on the right side under units.
- All of this we must multiply by 3.
- On the bead frame, perform the multiplication.
- 1 x 3 = 3, move forward three units beads.
- 2 x 3=6, but 6 what? 6 tens! Move forward 6 ten beads, etc. (By this time the child should have memorized the combinations and should bring forward the product of the small multiplication)
- Read the product and record it on the left side of the form.
- Try a dynamic multiplication
- 2463
x 4
Decompose the multiplicand in the same way as before. - Perform the multiplication 3 x 4 = 12, 12 is 2 units and 1 ten...6 x 4 = 24, 24 what? 24 tens 4 tens and 2 hundreds, etc.
- Read the product on the frame and record it.
Control Of Error
Points Of Interest
Purpose
- To help the child understand the importance of the position of each digit.
Variation
- Try performing any one of these multiplications out of order, i.e. 6 x 4 = 24 tens, 2 x 4 = 8 thousands, 3 x 4 = 12 units and 4 x 4 = 16 hundreds. The product is still the same.
Links
Handouts/Attachments