Mastering Addition to 100 with Regrouping

The video tutorial explains the process of adding numbers using blocks and regrouping. It covers three examples: adding 45 and 45, 25 and 59, and 58 and 35. Each example demonstrates how to add the ones and tens, regroup when necessary, and write the results in the correct columns. The tutorial emphasizes understanding the concept of regrouping in addition.

What is the first step when adding 45 blocks and 45 blocks?

• Add the tens first

• Add the ones first

• Subtract the ones

• Subtract the tens

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

How many tens do you get when you regroup 10 ones?

• 0 tens

• 1 ten

• 2 tens

• 10 tens

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the total number of blocks when you add 45 blocks and 45 blocks?

• 90 blocks

• 95 blocks

• 80 blocks

• 85 blocks

Tags

CCSS.2.NBT.B.7

When adding 25 blocks and 59 blocks, what do you do after adding the ones?

• Subtract the tens

• Add the tens

• Multiply the tens

• Divide the tens

Tags

CCSS.2.NBT.B.6

What is the total number of blocks when you add 25 blocks and 59 blocks?

• 94 blocks

• 74 blocks

• 104 blocks

• 84 blocks

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

When adding 58 and 35, what do you get after regrouping 13 ones?

• 2 tens and 3 ones

• 1 ten and 5 ones

• 1 ten and 3 ones

• 2 tens and 5 ones

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the total when you add 58 and 35?

• 83

• 88

• 93

• 98

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5