Primary Five First Term Lesson Note For Mathematics

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WEEK 2

TOPIC: PLACE VALUE

BEHAVIORAL OBJECTIVES: FIRST TERM Pupils should be able to:

(i). Give the value of a digit in a Whole number e.g. the values of Each digit of the number

(ii). State the value of each of the Digit in the decimal number given.

CONTENT

PLACE VALUE

1 is million

2 is hundred million

3 is ten million

4 is million

5 is hundred thousand

6 is ten thousand

7 is thousand

8 is hundred

9 is ten

0 is units

To find the value of a digit in a number, arrange the number in a table like the one on page 5. When you write down the digit, check to see under which group it belongs. Then you can write down the value.

Another way is to underline the digit and count how many numbers there are to the right of the digit. In place of those numbers you replace with zeros. For example, looking at the digits 7 and 5 in the number 235 678 140:

1 2 3 4 7 is followed by 4 zeros

1 2 3 4 5 6 5 is followed by 6 zeros

The digit 7 is followed by 4 zeros.

Therefore, the value of 7 in this number is 70 000.

The digit 5 is followed by 6 zeros.

Therefore, the value of 5 in this number is 5 000 000.

Exercise 1

In each box, write the corresponding digit for each place value.

  1. 4 822 124 ! hundreds 2. 55 907 013 ! thousands
  2. 190 641 335 ! hundred thousands 4. 248 307 214 ! tens
  3. 7 694 097 ! millions 6. 201 480 110 ! hundred thousands
  4. 42 458 219 074 ! ten billions

Exercise 2

Write down the place value of each underlined digit.

1. 18 000 078 854 2. 612 689 725 3. 398 264 480 4. 89 256 379

5. 1 370 152 6. 853 672 175 7. 2 952 671 450 8. 163 456

9. 538 276 587 10. 6 381 289 465

What is the place value and value of 5 in each number?

1. 1 642 156 2. 3 478 945 3. 5 781 234 160 4. 3 467 590 777

5. 4 878 431 529 6. 6 975 186 234 7. 2 296 145 391 8. 4 171 352 567

9. 857 474 238 10. 562 100 364

Writing numbers in words and figures

When you write numbers in words, follow these steps.

  1. Put a space in the number, three digits from the right.
  2. Treat each part like a separate number.

Example

Here 1 687 152 496 has been written in words.

Solution

One billion, six hundred and eighty-seven million, one hundred and fifty-two thousand, four hundred and ninety-six

Billions Millions Thousands Hundreds

H T U   H T U   H T U   H T U
    1   1 8 7 1 5 2 4 9 6

 

Exercise 1

Write each number in words. Remember to separate each three digits with a space.

Count from the right.

1. 734 547 485 2. 34 272 771 3. 714 872 854 4. 356 109 328

5. 641 458 867 6. 440 169 142 7. 9 685 588 213 8. 3 698 421 786

9. 1 476 637 462 10. 5 746 925 897 11. 2 675 840 514 12. 8 407 612 999

13. 6 715 674 138 14. 1 432 109 674 15. 7 598 763 865 16. 4 354 596 857

Exercise 2

Write each number in figures. The first is done for you.

  1. Forty-two million, eight hundred and thirty-three thousand, seven hundred and twenty-six

42 833 726

  1. Fifty-one million, two hundred and ninety-one thousand, eight hundred and ninety nine
  2. Seventy-six million, four hundred and thirty-nine thousand, two hundred
  3. Sixty-three million, five hundred and one thousand, four hundred and eighty-five
  4. Four hundred and forty-five million, five hundred and seventy-seven thousand, five hundred and seventy-eight
  5. One hundred and seventy-three million, five hundred and forty-seven
  6. Six hundred and ninety-two million, one hundred and ninety-one thousand, three hundred and ninety-three
  7. Four hundred and ninety-eight million, six hundred and ninety-five thousand, nine hundred and ninety
  8. Two hundred and fourteen million, three hundred and twenty-three thousand, four hundred and twenty-one
  9. One hundred million
  10. Six hundred and eight million, four hundred and seven thousand, one hundred and fifty-four
  11. Seven billion
  12. Seven billion, four hundred and sixteen million, two hundred and eighty-one thousand, four hundred and thirty-six
  13. Four billion, nine hundred and sixty-three million
  14. Eight billion, seven hundred and ninety-five million, four hundred and ninety-nine thousand
  15. Five billion, eight hundred and thirty-nine million, five hundred and sixty-three thousand, seven hundred and eighteen
  16. Nine billion, eight hundred and seventy-six million, five hundred and forty three thousand, two hundred and ten

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