3 Digit Subtraction with Regrouping Using Base 10 Blocks

What is the main educational tool used in this video for teaching subtraction?

• Algebraic formulas

• Base 10 blocks

• Number lines

• Digital calculators

What is the first step in subtracting 224 from 343 using base 10 blocks?

• Subtract in the ones place

• Place the blocks on the value mat

• Trade one ten for ten ones

• Subtract in the tens place

Why did we need to trade one ten for ten ones?

• Because we had too many tens

• To simplify the problem

• To make subtraction in the ones place possible

• To subtract in the tens place

After regrouping, how many ones did we have to subtract from?

• 13 ones

• 10 ones

• 9 ones

• 3 ones

How many tens are left after subtraction?

• Three tens

• Two tens

• No tens

• One ten

What is the final step in the subtraction process demonstrated?

• Regrouping once more

• Writing the answer on the place value mat

• Subtracting in the hundreds place

• Checking the work with a calculator

What is the result of subtracting 224 from 343?

• 321

• 119

• 123

• 219

What does the standard algorithm confirm about our subtraction?

• The necessity of base 10 blocks

• The correctness of our subtraction

• The need for a different strategy

• That we need to regroup again

What should students do if they encounter difficulties with the problems?

• Give up on learning subtraction

• Re-watch the video or review the example

• Skip the difficult problems

• Guess the answers

What is encouraged at the end of the video?

• To watch another video

• To take a break

• To teach someone else

• To practice the strategy shown