Basic Addition and Subtraction Concepts

This video tutorial teaches how to use number charts to add or subtract 10 from two and three digit numbers. It begins with a review of one and two digit numbers, then explores patterns in the 101 to 200 chart. The tutorial demonstrates adding and subtracting 10 from both two and three digit numbers, emphasizing the changes in the tens place while the hundreds and ones places remain constant.

What is the largest one-digit number?

• 7

• 10

• 9

• 8

What happens to the tens digit when you add 10 to 24?

• It decreases by 1

• It stays the same

• It increases by 1

• It doubles

If you subtract 10 from 57, what is the result?

• 67

• 47

• 37

• 57

What is 125 plus 10?

• 115

• 125

• 145

• 135

When adding 10 to 172, which digit changes?

• Tens

• Hundreds

• Ones

• None

What is the result of 365 plus 10?

• 385

• 355

• 375

• 365

What is 175 minus 10?

• 175

• 155

• 165

• 185

If you subtract 10 from 148, what is the new number?

• 128

• 158

• 148

• 138

What is the result of 365 minus 10?

• 375

• 345

• 365

• 355

When subtracting 10 from 172, which digit changes?

• Hundreds

• None

• Tens

• Ones