Multiplying by Zero
This is a complete lesson for third grade, with teaching and exercises, about multiplying by zero. Students learn the meaning of a number times zero, or zero times a number, both as regards to equalsize groups and number line jumps. The exercises involve filling in the table of zero and the table of one, and some miscellaneous multiplication problems.
Five groups, each has zero giraffes. 5 × 0 = _____ 
Zero groups or NO groups of five giraffes. 0 × 5 = 0 



Remember, multiplication means you have so many of the samesized groups.

Don't forget about multiplying by one, either.

1. Let's see if you understood! Multiply.
a. 0 × 5 = _____ 0 × 0 = _____ 
b. 1 × 1 = _____ 1 × 9 = _____ 
c. 0 × 10 = _____ 1 × 10 = _____ 
d. 6 × 1 = _____ 6 × 0 = _____ 
2. Fill in the easy multiplication tables of zero and one.


3. Solve. You can draw to help.
a. Mommy
bought four cartons of eggs. Each carton had six eggs but


b. Mary has a jar of marbles, a jar of pretty stones, and a jar of pine
cones. Each jar has 20 things in it. How many things does Mary have in these jars?

4. Multiply.

5. Fill in the multiplication table:
 
This lesson is taken from Maria Miller's book Math Mammoth Multiplication 1, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.
Math Mammoth Multiplication 1
A selfteaching worktext for 3rd grade that covers multiplication concept from various angles, word problems, a guide for structural drilling, and a complete study of all 12 multiplication tables.
Download ($5.20). Also available as a printed copy.