Counting of Whole Numbers Basic 3 Mathematics Lesson Note

A. COUNTING SKILL: NUMBERS 601-620

Counting from 601 to 620: 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620

Practice counting:

• From 605 to 615: _______
• From 612 to 620: _______
• Backwards from 615 to 605: _______

Number patterns:

• What comes after 609? _______
• What comes before 615? _______
• What comes between 617 and 619? _______

B. WRITING SKILL: WRITING OF THE NUMBERS

Write in words:

• 601 = Six hundred and one
• 605 = Six hundred and five
• 610 = Six hundred and ten
• 615 = Six hundred and fifteen
• 620 = Six hundred and twenty

Write in figures:

• Six hundred and two = _______
• Six hundred and eight = _______
• Six hundred and twelve = _______
• Six hundred and seventeen = _______
• Six hundred and nineteen = _______

Practice writing:

• 603 = _______
• 607 = _______
• 611 = _______
• 616 = _______
• Six hundred and four = _______
• Six hundred and thirteen = _______

C. COUNTING OF WHOLE NUMBERS

Forward counting: 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610

Backward counting: 620, 619, 618, 617, 616, 615, 614, 613, 612, 611, 610

Skip counting by 2s: 600, 602, 604, 606, 608, 610, 612, 614, 616, 618, 620

Skip counting by 5s: 600, 605, 610, 615, 620

Missing numbers:

• 608, 609, _____, 611, _____
• 614, _____, 616, _____, 618
• 601, _____, 603, _____, _____

D. COUNTING IN GROUPS

Groups of 2:

• 602, 604, 606, 608, 610
• 612, 614, 616, 618, 620

Groups of 5:

• 605, 610, 615, 620

Groups of 10:

• 600, 610, 620

Practice grouping: Count these objects and write the total:

• ★★ ★★ ★★ = _____ groups of 2 = _____ in total
• 🔵🔵🔵🔵🔵 🔵🔵🔵🔵🔵 = _____ groups of 5 = _____ in total

E. QUANTITATIVE REASONING

Comparing numbers: Use >, <, or =

• 605 _____ 610
• 618 _____ 615
• 612 _____ 612
• 620 _____ 601

Arranging numbers: Arrange from smallest to biggest: 614, 608, 620, 603, 611 Answer: _______

Number patterns: Complete the patterns:

• 602, 604, 606, _____, _____
• 605, 610, 615, _____
• 620, 618, 616, _____, _____

Word problems:

1. A basket has 615 oranges. Another basket has 608 oranges. Which basket has more oranges?
2. Musa counted 612 bottle caps. Amina counted 607 bottle caps. How many more bottle caps did Musa count?
3. There are 620 pupils in a school. 305 are boys. How many are girls?

CLASS EXERCISES

1. Count and write the missing numbers:
   1. 606, 607, _____, _____, 610
2. Write in words:
   1. 609 = _______
   2. 614 = _______
   3. 618 = _______
3. Write in figures:
   1. Six hundred and six = _______
   2. Six hundred and eleven = _______
4. Count backwards from 620 to 615:
5. Complete the skip counting by 2s: 602, 604, _____, _____, 610
6. Circle the larger number:
   1. 609 or 619
   2. 615 or 605
   3. 620 or 612
7. Arrange from biggest to smallest: 607, 620, 601, 615, 610
8. Fill in the pattern: 610, 612, 614, _____, _____
9. Count in groups of 5 from 600 to 620:
10. Word problem: A shop has 618 biscuits. They sell 309 biscuits. How many biscuits are left?