Math Intervention 3–5 Grade

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:

1. 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.


2. 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.


3. The player shows a model of the partial
   products by placing base ten blocks to show
   the array.


4. 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.


5. 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.

PLAYERS:

3 OR MORE