Ordering Of Whole Numbers Basic 3 Mathematics Lesson Note

COUNTING SKILL: NUMBERS 641-660

Counting from 641 to 660: 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660

Practice counting:

• From 645 to 655: _______
• From 652 to 660: _______
• Backwards from 660 to 650: _______

Skip counting by 5s: 640, 645, 650, 655, 660

Fill in missing numbers:

• 646, 647, _____, 649, _____
• 655, _____, 657, _____, 659
• _____, 642, _____, 644, _____

B. WRITING SKILL: WRITING OF THE NUMBERS

Write in words:

• 641 = Six hundred and forty-one
• 645 = Six hundred and forty-five
• 650 = Six hundred and fifty
• 655 = Six hundred and fifty-five
• 660 = Six hundred and sixty

Write in figures:

• Six hundred and forty-three = _______
• Six hundred and forty-eight = _______
• Six hundred and fifty-two = _______
• Six hundred and fifty-seven = _______
• Six hundred and fifty-nine = _______

Practice:

• 644 = _______
• 651 = _______
• 658 = _______

C. ORDERING OF WHOLE NUMBERS

Arranging from smallest to biggest: Example: 648, 642, 655, 641, 650 Answer: 641, 642, 648, 650, 655

Arranging from biggest to smallest: Example: 647, 653, 641, 659, 645 Answer: 659, 653, 647, 645, 641

Practice ordering:

1. Arrange from smallest to biggest: 656, 641, 649, 654, 643 Answer: _______
2. Arrange from biggest to smallest: 658, 645, 660, 642, 651 Answer: _______

D. THE USE OF SYMBOLS >, < AND =

Understanding the symbols:

• > means “greater than” (bigger than)
• < means “less than” (smaller than)
• = means “equal to” (same as)

Remember: The open mouth points to the bigger number!

Examples:

• 650 > 645 (650 is greater than 645)
• 642 < 648 (642 is less than 648)
• 655 = 655 (655 is equal to 655)

Practice with symbols:

1. 651 _____ 647 (>, <, =)
2. 640 _____ 660 (>, <, =)
3. 649 _____ 649 (>, <, =)
4. 658 _____ 652 (>, <, =)
5. 644 _____ 654 (>, <, =)

E. VALUE OF NUMBERS

Place value in ordering: When comparing numbers:

• First, compare hundreds place
• Then, compare tens place
• Finally, compare units place

Example: Compare 648 and 652

• Hundreds: 6 = 6 (same)
• Tens: 4 < 5 (4 is less than 5)
• So 648 < 652

Practice comparing:

• 641 and 649: _____
• 655 and 650: _____
• 647 and 647: _____

F. QUANTITATIVE REASONING

Number patterns:

1. 641, 643, 645, _____, _____
2. 660, 658, 656, _____, _____
3. 650, 652, 654, _____, _____

Word problems:

1. Kemi has 645 marbles. Tolu has 653 marbles. Who has more marbles?
2. A farmer harvested 648 yams on Monday and 642 yams on Tuesday. On which day did he harvest more yams?
3. Three baskets contain 651, 647, and 659 oranges. Arrange the baskets from the one with the most oranges to the one with the least.

Missing numbers in sequences:

• 645 < _____ < 647
• 652 > _____ > 650
• 658 = _____

CLASS EXERCISES

1. Count from 646 to 655:
2. Write in words:
   1. 647 = _______
   2. 654 = _______
3. Write in figures:
   1. Six hundred and forty-nine = _______
   2. Six hundred and fifty-six = _______
4. Arrange from smallest to biggest: 659, 643, 651, 646, 655
5. Use >, <, or =:
   1. 648 _____ 652
   2. 660 _____ 645
   3. 650 _____ 650
   4. 657 _____ 654
6. Circle the bigger number:
   1. 641 or 649
   2. 655 or 652
   3. 660 or 658
7. Complete the patterns:
   1. 642, 644, 646, _____, _____
   2. 660, 655, 650, _____, _____
8. Compare and write the symbol:
   1. 653 _____ 648
   2. 641 _____ 647
   3. 656 _____ 656
9. Word problem: A shop sold 647 bottles on Friday and 653 bottles on Saturday. On which day did they sell fewer bottles?
10. Fill in the missing numbers:
    1. 649 < _____ < 651
    2. 658 > _____ > 656