Choco-blocks

Purpose

This is a level 3 number activity from the Figure It Out series. It relates to Stage 6 of the Number Framework.

Achievement Objectives
NA3-2: Know basic multiplication and division facts.
NA3-2: Know basic multiplication and division facts.
Student Activity

Click on the image to enlarge it. Click again to close. Download PDF (105 KB)

Specific Learning Outcomes

use arrays to solve multiplication facts

Required Resource Materials

FIO, Level 3, Basic Facts, Choco-Blocks, page 10

Activity

This activity shows students another model for multiplication, that is, that multiplication can be shown as a rectangular array. Making chocolate bar rectangles reinforces the commutative property of multiplication (a x b = b x a). This activity also shows that multiplication can be used to find the area of a rectangle. (This connects to the measurement strand.)
This activity will help students find the factors for a given product. The set of factors for 12 (1, 2, 3, 4, 6, and 12) can be found from the three different lengths of the chocolate blocks.
As an extension, you could ask students to imagine the chocolate blocks as squares and encourage them to find all square numbers from one to 100.

Answers to Activity

a. 1 x 18; 2 x 9; 3 x 6
b. 1 x 25; 5 x 5
c. 1 x 36; 2 x 18; 3 x 12; 4 x 9; 6 x 6
d. 1 x 100; 2 x 50; 4 x 25; 5 x 20; 10 x 10

Attachments

Log in or register to create plans from your planning space that include this resource.