CHAPTER IV NOTATION AND NUMERATION Writing numbers in figures is called notation. Reading numbers is called numeration. ORAL EXERCISES 1. How many tens in a hundred? Count by tens to one hundred. How many hundreds in a thousand? Count by hundreds from one hundred to one thousand. How many figures are required to write ones? to write tens? to write hundreds? to write thousands? 2. What is the largest number that can be written with four figures? One more than nine thousand nine hundred. ninety-nine is ten thousand, written 10,000. 3. How many figures does it take to write ten thousand? How many figures at the right of the comma? 4. What place, counting from the right, is hundreds? What place is thousands? What place is ten-thousands ? 5. Count by thousands from 1000 to 10,000. 6. How many thousands are there in ten thousand? 7. Read 11,000, 12,000, 25,000, 50,000. 8. Count from 11,000 to 11,020. 9. Write fifty-five; five hundred fifty; five thousand fifty-five; fifty-five thousand fifty-five. 1. Write in words the numbers in Example 10 of the preceding exercise. 2. Write in figures: Sixty thousand six hundred sixty-four Thirty-seven thousand eighty Forty thousand six Forty-nine thousand seven hundred eight Ten thousand one One thousand ten Sixty thousand sixteen Nineteen thousand fifty Seventy-seven thousand seven hundred seventy-seven Ninety thousand eighteen Sixty-eight thousand four hundred Eighteen hundred Ten thousand one hundred one Ninety-five thousand three hundred sixty Three thousand two hundred thirteen Thirty-three thousand three ADDITION ORAL EXERCISES See how quickly you can add these columns. You should be able to add them and check your work in one minute. 7. James spent $0.15 for a ball, $0.50 for a mitt, and $0.40 for a bat. How much money did he spend? 14. Read these, then find the sum: $8.25+ $6.14 + $4.37 + $7.86 + $9.50. 15. When the number of cents is less than ten cents, write the number of cents in the ones column and put 0 in the tens column, thus: two dollars and five cents is written $2.05. 16. Write $1 and 9 ct.; $2 and 4 ct.; $3 and 8 ct.; $7 and 7 ct. |