Understanding Subtraction with Regrouping

The video tutorial explains the concept of the number 35 as 3 tens and 5 ones. It introduces a subtraction problem, 35 minus 8, and demonstrates how to solve it using regrouping. The process involves taking one ten from the tens place and adding it to the ones place, allowing the subtraction of 8 from 15 ones. The result is 27, with 2 tens and 7 ones remaining.

What is the composition of the number 35?

• 2 tens and 15 ones

• 5 tens and 3 ones

• 4 tens and 5 ones

• 3 tens and 5 ones

Tags

CCSS.2.NBT.B.7

What is the main challenge when trying to subtract 8 from 35?

• Not enough ones

• Not enough tens

• Too many ones

• Too many tens

Tags

CCSS.2.NBT.B.7

What is the purpose of regrouping in subtraction?

• To increase the number of tens

• To convert ones into tens

• To convert tens into ones

• To decrease the number of ones

Tags

CCSS.1.OA.A.1

After regrouping, how many ones do we have before subtracting 8?

• 5 ones

• 10 ones

• 15 ones

• 8 ones

Tags

CCSS.2.NBT.B.6

What is the result of 35 minus 8 after regrouping?

• 30

• 28

• 25

• 27

Tags

CCSS.2.NBT.B.7

How many tens are left after performing the subtraction?

• 2 tens

• 3 tens

• 1 ten

• 4 tens

Tags

CCSS.1.OA.A.1

How many ones are left after performing the subtraction?

• 8 ones

• 7 ones

• 6 ones

• 5 ones

Tags

CCSS.1.OA.A.1

What is the alternative method to solve the subtraction problem without drawing?

• Adding instead of subtracting

• Ignoring the ones place

• Mentally regrouping tens and ones

• Using a calculator

Tags

CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

In the alternative method, how many ones do we start with after regrouping?

• 8 ones

• 15 ones

• 5 ones

• 10 ones

Tags

CCSS.2.OA.A.1

What is the final answer to 35 minus 8 using the alternative method?

• 25

• 27

• 28

• 30

Tags

CCSS.2.OA.A.1