Vocabulary
The numbers you multiply together are called factors. What is the answer to a multiplication problem called?
Product
How do you write 52,384 in expanded form?
50,000 + 2,000 + 300 + 80 + 4
What is 45 × 100?
4,500
What is the product of 21 × 4?
84
What does the letter "Z" stand for in the multiplication mnemonic "Many Zoos Many Animals"?
Zero (placeholder)
Which number form uses only written words instead of digits?
Word form
Using the "Zero Trick" for division (6,000 ÷ 300), how many zeros do you remove from the dividend?
Two zeros
When multiplying a 2-digit number by another 2-digit number, why do we put a "Magic Zero" in the ones place of the second row?
Because we are multiplying by a tens digit
or
It is a placeholder
What is the term for a group of three digits in a large number separated by commas?
A period
What is the standard form of "five hundred eight thousand, two hundred forty-three"?
508,243
What is 300 ÷ 100?
3
What is the product of 34 × 12?
408
In the mnemonic "Many Zoos Many Animals," what are the four steps in order?
Multiply (ones place), Zero (placeholder), Multiply (tens place), Add (partial products)
When reading a large number in word form, what word do you say when you encounter the second comma from the right?
Million
When you multiply a number by 10, which direction do the digits jump on a place value chart?
To the left
Solve 45 × 23. What is the final product?
1,035