Two-Digit Addition Concepts

The video tutorial teaches two-digit addition using composing and decomposing strategies. It covers examples like 28 + 36, 47 + 25, 78 + 13, 49 + 36, 17 + 29, and 14 + 68. The instructor uses base ten blocks, tens frames, and touch points to demonstrate the process. Students are encouraged to practice independently and collaboratively, focusing on place value and using a T-chart to separate tens and ones.

What is the main objective of the lesson on two-digit addition?

• To divide two-digit numbers

• To multiply two-digit numbers

• To add two-digit numbers using composing and decomposing

• To learn subtraction of two-digit numbers

How many tens and ones are there in the number 28?

• 2 tens and 6 ones

• 3 tens and 8 ones

• 3 tens and 6 ones

• 2 tens and 8 ones

What is the result of adding 47 and 25 using base ten blocks?

• 92

• 82

• 62

• 72

What is the purpose of using a T-chart in the new method?

• To separate ones and hundreds

• To separate hundreds and thousands

• To separate tens and ones

• To separate units and tens

What is the sum of 78 and 13 using the T-chart method?

• 111

• 101

• 91

• 81

In the guided practice, what is the sum of 49 and 36?

• 105

• 95

• 85

• 75

What is the first step in adding two-digit numbers using the T-chart method?

• Add the tens first

• Add the ones first

• Subtract the ones first

• Subtract the tens first

What is the sum of 17 and 29 in the guided practice?

• 66

• 56

• 46

• 36

In the independent practice, what is the sum of 14 and 68?

• 102

• 82

• 92

• 72

What should you do after composing a ten in the ones place?

• Subtract it from the tens place

• Move it to the tens place

• Add it to the hundreds place

• Leave it in the ones place