Mastering Addition to 50 with Regrouping Techniques

The video tutorial demonstrates how to add the numbers 25 and 18 using base ten blocks and a place value chart. It begins by representing each number with blocks, then combines the ones, regrouping them into tens. The tens are then added together to find the total sum of 43. The video concludes with a preview of the next tutorial on using bar models for addition.

How many tens and ones does the number 25 consist of in base ten blocks?

• 2 tens and 5 ones

• 3 tens and 2 ones

• 1 ten and 5 ones

• 2 tens and 4 ones

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the total number of ones when 25 and 18 are combined?

• 12 ones

• 11 ones

• 13 ones

• 14 ones

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

After converting 10 ones into a ten, how many ones are left?

• 3 ones

• 2 ones

• 1 one

• 4 ones

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the total number of tens after combining the tens from 25 and 18?

• 3 tens

• 4 tens

• 5 tens

• 6 tens

Tags

CCSS.2.OA.A.1

What is the final result of adding 25 and 18 using base ten blocks?

• 43

• 42

• 41

• 40

Tags

CCSS.2.OA.A.1