Regrouping and Decomposing in Subtraction with Zeros in the 10s or Ones Places

This video tutorial teaches how to regroup when subtracting by decomposing hundreds or tens. It uses base 10 blocks to illustrate the process of breaking down numbers to facilitate subtraction, especially when there are no tens or ones available. The tutorial provides examples of subtracting numbers like 700 - 342 and 571 - 328, demonstrating how to decompose hundreds into tens and tens into ones to complete the subtraction process.

What is the purpose of decomposing hundreds into tens in subtraction?

• To ensure there are enough tens to subtract

• To simplify addition

• To change the number to a decimal

• To make the number larger

In the example of 700 - 342, what is the first step in the regrouping process?

• Subtract the ones directly

• Multiply the tens

• Decompose a hundred into tens

• Add more hundreds

After decomposing a hundred into tens, what is the next step in the subtraction of 700 - 342?

• Decompose a ten into ones

• Subtract the hundreds

• Add more tens

• Multiply the ones

In the subtraction of 571 - 328, why is it necessary to decompose a ten into ones?

• To increase the number of hundreds

• To have enough ones to subtract

• To convert the number to a fraction

• To simplify the tens

What is the final result of the subtraction 571 - 328 after regrouping?

• 300

• 358

• 243

• 200