Strategy 1: Use Unit Form
Strategy 1: Use Unit Form is a Grade 4 math skill in enVision Mathematics, Chapter 3: Use Strategies and Properties to Multiply by 1-Digit Numbers. Students learn to multiply multi-digit numbers by thinking in unit form (reading hundreds, tens, and ones), then applying basic facts to each unit.
Key Concepts
To multiply by a multiple of 10, 100, or 1,000, you can express the multiple in unit form. For example, think of $40$ as $4$ tens, $400$ as $4$ hundreds, and $4,000$ as $4$ thousands.
Common Questions
What is the unit form strategy for multiplication?
Unit form means reading each place value as a number of units. For example, 342 is 3 hundreds, 4 tens, 2 ones. You then multiply each unit count by the single-digit factor.
How do you use unit form to multiply?
Read the number in unit form (hundreds, tens, ones). Multiply each unit amount by the factor, keeping track of the place value. Add all results together.
What is an example of unit form multiplication?
For 3 times 241: unit form is 2 hundreds, 4 tens, 1 one. Compute 3 times 2 hundreds equals 6 hundreds, 3 times 4 tens equals 12 tens (1 hundred 2 tens), 3 times 1 equals 3 ones. Total: 723.
How does unit form connect to the partial products method?
Unit form is essentially the same concept as partial products but expressed verbally. Both break the multi-digit number into place value parts and multiply each by the single-digit factor.
What chapter covers unit form multiplication in enVision Grade 4?
Strategy 1: Use Unit Form is covered in Chapter 3: Use Strategies and Properties to Multiply by 1-Digit Numbers in enVision Mathematics Grade 4.