Subtraction Strategies with Open Number Lines

This video tutorial teaches how to subtract numbers within 1000 using an open number line. It covers breaking numbers into place values, visualizing subtraction with number lines, and exploring different subtraction methods. The tutorial also demonstrates subtraction by hopping up on a number line, providing flexibility in solving subtraction problems.

What is the purpose of using an open number line in subtraction?

• To add numbers quickly

• To visualize subtraction by breaking numbers into place values

• To divide numbers accurately

• To multiply numbers easily

How can subtraction be described in terms of addition?

• Subtraction is the same as addition

• Subtraction is the opposite of addition

• Subtraction is unrelated to addition

• Subtraction is a type of addition

What is the first step in using an open number line for subtraction?

• List the smallest number at the start

• Add the numbers together

• List the largest number at the end

• Subtract the ones first

In the example of subtracting 872 minus 346, what is the result after subtracting the hundreds?

• 572

• 532

• 526

• 346

What is a common misunderstanding when using open number lines?

• You must always subtract the largest number first

• You can only hop based on place value

• You must always subtract the smallest number first

• You cannot use open number lines for addition

How can you subtract 559 minus 234 using an open number line?

• Subtract 200, then 30, then 4

• Subtract 4, then 30, then 200

• Subtract 234 all at once

• Subtract 100, then 100, then 34

What is the final result of 926 minus 671 using the hopping up method?

• 300

• 200

• 671

• 255

When hopping up to find the difference, what is the first step?

• Subtract the hundreds first

• Add the tens first

• Add the hundreds first

• Add the ones first

In the hopping up method, what is the sum of the hops to reach 926 from 671?

• 100

• 200

• 255

• 300

What is the benefit of using different orders in subtraction on an open number line?

• It makes subtraction faster

• It allows flexibility in solving

• It is easier to understand

• It is more accurate