Mastering 2-Digit Addition with Regrouping

This lesson teaches how to add two-digit numbers by making a ten in the tens place. It provides three examples: adding 45 and 73, 56 and 92, and 76 and 81. Each example demonstrates the process of adding the ones and tens places, carrying over when necessary, and placing the results in the correct positions. The lesson concludes with a prompt for students to solve similar addition problems.

What is the first step in adding two-digit numbers?

• Multiply the numbers

• Add the ones place

• Subtract the smaller number from the larger

• Add the tens place

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

When adding 45 and 73, what do you get in the ones place?

• 8

• 7

• 9

• 10

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

In the addition of 45 and 73, what digit goes into the hundreds place?

• 2

• 3

• 1

• 0

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the sum of 56 and 92?

• 168

• 158

• 148

• 138

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

When adding 76 and 81, what is the result in the tens place?

• 8

• 5

• 6

• 7

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the correct sum of 76 and 81?

• 157

• 137

• 167

• 147

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the first step in solving addition problems with two-digit numbers?

• Add the tens place

• Multiply the two numbers

• Add the hundreds place

• Start with the ones place

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5