1. Fifteen thousand nine hundred eighty. 2. Twenty-seven thousand nine hundred sixteen. 3. One hundred fifty thousand eight hundred fifty. 4. Three hundred twenty-four thousand one hundred nine. 5. Seven hundred thousand five hundred fortysix. Numbers above 100,000 COUNTING BY 100,000's To 1,000,000 We may count hundred-thousands as we count hundreds: 100 thousand, 200 thousand, etc. 1. Count by hundred-thousands from 100 thousand to 1,000 thousand. 2. Write in a column the numbers you have counted : 100,000 200,000, etc. One thousand thousand (1,000,000) is called a million. We may count millions as we count units: 1 million, 2 million, 3 million, etc. 3. Count by millions from 1 million to 20 million, and write the numbers as you count them. 1,000,000 2,000,000 3,000,000, etc. Write these numbers on your chart, being careful to write each figure in the proper column: 4. 1,000,000. 1. 56,742. 7. 100,000,000. 8. 1,000,000,000. 9. 7,649,358. 1. Beginning at the left, who is the first pupil? The third? The sixth? The ninth? The fifth ? The seventh? The tenth? The eighth? 2. Beginning at the right, who is the first? The fourth? The sixth ? 3. Counting from the left, what is John's place? William's? 4. Counting from the right, what is Mary's place? Jane's? WRITTEN EXERCISE 1. Write the names of the ordinal numbers from 1 to 20. 2. After each name, write its abbreviation, thus: Look at these words closely. Which are easy to remember? How is fifth formed from five? twelfth from twelve? Read the following: 17th, 23d, 65th, 80th, 31st, 72d, 93d, 11th, 6th, 29th, 40th, 61st, 103d, 207th, 625th, 500th, 874th, 750th, 1000th, 2500th. Roman Notation The figures 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 are known as Arabic numerals. The Romans used letters in writing numbers. They used I, V, X, L, C, D, and M. Other numbers are written by putting some of these letters together. Look carefully at the way in which the numbers from 1 to 10 are written in the Roman notation. Look at VI, VII, and VIII. Tell why VI denotes 6; VII denotes 7; VIII denotes 8. Look at IV and IX. Tell why IV denotes 4; IX denotes 9. Write 10, 11, 12, and 13 in the Roman notation. Write 15, 16, 17, and 18. Look at these numerals: Write 14 and 19. We see that when X is placed before L, the value of L is decreased by 10; but when X is placed after L, the value of L is increased by 10. In the same way, XC denotes 90 and CX denotes 110. The Roman numerals from I to XII are used on most clock dials. Some clockmakers use IIII instead of IV. The chapters in a book are usually numbered by means of Roman numerals, as Chapter XXIX. In inscriptions on monuments and public buildings, Roman numerals are used for dates; thus the year 1656 would be written MDCLVI. The Romans wrote 1900 in this way: MDCCCC. MCM is generally used at the present time. |