168 Multiplication and Division Concepts
Products in Parts
A game designed to build the concept of partial products
Materials:
Q^ Several sheets of centimeter graph paper
Q^ Highlighter for each player
Q^ Base ten blocks
Q^ Two red dice (labeled 1–6 with numerals)
Q^ Two white dice (labeled 1–6 with numerals)
Q^ Dry erase boards and markers (or paper and pencils)
Directions:
- The fi rst player rolls all four dice to generate a 2-digit times
2-digit multiplication equation. The red dice represent the
tens and the white dice represent the ones. - The player shows the equation with lines and
dots using the highlighter on graph paper. For
example, 12 x 21 includes one line of ten and
two dots of one times two lines of ten and one
dot of one. - The player shows a model of the partial
products by placing base ten blocks to show
the array. - Other players race to record the partial products (10 x 20) +
(10 x 1) + (2 x 20) + (2 x 1) = 200 + 10 + 40 + 2. The fi rst player
with the correct partial products scores 1,000 points. - Players take turns rolling, modeling and recording partial
products. The winner is the fi rst player to score 10,000.
Content Differentiation:
Moving Back: Try single-digit times 2-digit equations.
Moving Ahead: Use decahedron dice or 0–9 spinners.