CHAPTER V

READING AND WRITING NUMBERS

For convenience in reading large numbers, the figures are generally separated by commas into groups of three figures each, called periods.

The first period, counting from the right, is units the second, thousands.

The following table shows the arrangement of these periods, and the three orders of figures in each period:

THOUSANDS' PERIOD UNITS' PERIOD

7 6

The number in the table is read, "641 thousand, 376."

WRITING NUMBERS

Express in figures:

1. Forty-two thousand.

2. Sixty-six thousand four.

3. Seventy-five thousand fifty.

4. Thirty-nine thousand one hundred twenty-two. 5. Two hundred ten thousand three hundred fifty. 6. Five hundred sixty-five thousand one hundred. 7. One hundred twenty-five thousand. 8. Six hundred thousand thirty-five.

9. Nine thousand twenty-six.

ROMAN NUMERALS

1. Write the Roman number for:

20, 25, 32, 48, 16, 50, 57.

2. LX = 60.

LXX=70. LXXX=80.

Write the Roman numbers from 50 through 70.

3. C 100. CC 200. XC 90. XCIX = 99.

=

=

=

Write the Roman numbers from 80 through 100.

4. Write 210, 290, 299, 300, 349, 235, 341.

Read XCII, CIX, CCXL, CCXCIX.

8597 hundreds + 14 tens + 19 ones.

19 ones = 1 ten and 9 ones. Write the 9 in ones' place and carry the 1 ten to tens' place. 14 tens + 1 15 tens. Write the 5 in tens' place and carry the 1 to hundreds' place. 7 hundreds + 1 hundred = 8 hundreds.

ten =

ADDITION

1. Find the sum of 2430, 4307, and 68. 24302 thousands + 4 hundreds +3 tens + 0 ones 43074 thousands + 3 hundreds +0 tens+ 7 ones

680 thousands + 0 hundreds + 6 tens + 8 ones 6805-6 thousands +7 hundreds +9 tens + 15 ones.

=

15 ones = 1 ten+ 5 ones. 1 ten 9 tens 10 tens or 1 hundred. 1 hundred + 7 hundreds = 8 hundreds.

4 thousands +2 thousands = 6 thousands.

4. Add the examples on pages 66 and 67.

ADDITION

Write from dictation; then add :

1. Twenty-five; two hundred twenty-five.
2. Four hundred two; seventy-three; nine.

3. Four thousand twenty; six hundred six; five. 4. Six hundred ninety; ten; two thousand four. 5. Two hundred eighty; nineteen; six; one thousand.

6. 230+65 +100+405.

7. 300+9+25+ 500.

8. 65+ 10 + 100% +1000¢.

9. $42+$504+ $ 105+$3.

10. 24 pt.+ 120 pt. +7 pt. +36 pt.
11. 1000 qt. + 14 qt. + 135 qt. + 10 qt.

12. 174 pk. +130 pk. +5 pk. +800 pk.