Place Value Of Numbers Basic 3 Mathematics Lesson Note

 COUNTING SKILL: NUMBERS 621-640

Counting from 621 to 640: 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640

Practice counting:

• From 625 to 635: _______
• From 632 to 640: _______
• Backwards from 640 to 630: _______

Fill in missing numbers:

• 626, 627, _____, 629, _____
• 635, _____, 637, _____, 639
• _____, 622, _____, 624, _____

B. WRITING SKILL: WRITING OF THE NUMBERS

Write in words:

• 621 = Six hundred and twenty-one
• 625 = Six hundred and twenty-five
• 630 = Six hundred and thirty
• 635 = Six hundred and thirty-five
• 640 = Six hundred and forty

Write in figures:

• Six hundred and twenty-three = _______
• Six hundred and twenty-eight = _______
• Six hundred and thirty-two = _______
• Six hundred and thirty-seven = _______
• Six hundred and thirty-nine = _______

Practice:

• 624 = _______
• 631 = _______
• 638 = _______

C. GROUPING NUMBERS IN HUNDREDS, TENS, UNITS

Understanding place value: In the number 625:

• H T U
• 6 2 5

Examples:

• 628: 6 hundreds, 2 tens, 8 units
• 634: 6 hundreds, 3 tens, 4 units
• 640: 6 hundreds, 4 tens, 0 units

Group these numbers:

D. VALUE AND PLACE VALUE OF NUMBERS

In the number 632:

• Place value of 6 = hundreds place
• Place value of 3 = tens place
• Place value of 2 = units place

Value of digits:

• Value of 6 = 600 (6 hundreds)
• Value of 3 = 30 (3 tens)
• Value of 2 = 2 (2 units)

Total value: 600 + 30 + 2 = 632

Practice: In the number 628:

• Place value of 6 = _____ place
• Place value of 2 = _____ place
• Place value of 8 = _____ place
• Value of 6 = _____
• Value of 2 = _____
• Value of 8 = _____

E. QUANTITATIVE REASONING

Expanded form:

• 635 = 600 + 30 + 5
• 627 = 600 + _____ + _____
• 634 = _____ + _____ + _____

Comparing place values: Which digit has the greater value?

• In 629: the 6 or the 2? _____
• In 635: the 3 or the 5? _____
• In 640: the 4 or the 0? _____

Building numbers:

• 6 hundreds + 3 tens + 7 units = _____
• 6 hundreds + 2 tens + 4 units = _____
• 6 hundreds + 4 tens + 0 units = _____

Word problems:

1. In the number 637, what is the value of the digit 3?
2. Which digit is in the tens place in 625?
3. What number has 6 hundreds, 3 tens, and 8 units?

CLASS EXERCISES

1. Count from 628 to 635:
2. Write in words:
   1. 623 = _______
   2. 636 = _______
3. Write in figures:
   1. Six hundred and twenty-nine = _______
   2. Six hundred and thirty-four = _______
4. Complete the place value chart:

1. Find the value of the underlined digit:
   1. 6̲29 = _____
   2. 63̲4 = _____
   3. 640̲ = _____
2. Write in expanded form:
   1. 631 = _____ + _____ + _____
   2. 638 = _____ + _____ + _____
3. Build these numbers:
   1. 6 hundreds + 2 tens + 6 units = _____
   2. 6 hundreds + 3 tens + 9 units = _____
4. Circle the digit in the tens place:
   1. 625, 634, 627, 640
5. Which is greater?
   1. The value of 3 in 635 or the value of 5 in 635? _____
6. Word problem: A number has 6 hundreds, 3 tens, and 2 units. What is the number?