Multiplying When the Basic Fact Ends in Zero
Multiplying When the Basic Fact Ends in Zero is a Grade 4 math skill in enVision Mathematics, Chapter 4: Use Strategies and Properties to Multiply by 2-Digit Numbers. Students learn to annex all zeros from the original factors to the basic fact product, even when the basic fact itself ends in zero.
Key Concepts
When multiplying multiples of 10, first find the product of the basic fact. Then, annex (attach) all the zeros from the original factors to the end of that product, even if the product of the basic fact already ends in a zero.
Common Questions
How do you multiply when the basic fact ends in zero?
Find the product of the basic fact first, then annex all zeros from the original factors to the end of that product, even if the basic fact product already ends in zero.
What does annex zeros mean in multiplication?
Annexing zeros means attaching the zeros from the original factors to the end of the basic fact product to get the final answer.
What is an example of multiplying when the basic fact ends in zero?
For 40 times 50, the basic fact is 4 times 5 equals 20. Annex the two zeros from 40 and 50 to get 2,000. The zero in 20 is not counted as one of the annexed zeros.
Why must you annex all factor zeros even if the basic fact ends in zero?
The zero at the end of the basic fact is part of the actual product value and should not be confused with the zeros from the factors. You must still attach the factor zeros separately.
What chapter covers multiplying multiples of 10 in enVision Grade 4?
Multiplying when the basic fact ends in zero is covered in Chapter 4: Use Strategies and Properties to Multiply by 2-Digit Numbers in enVision Mathematics Grade 4.