16. One boy had 15 marbles, another had 19, a third had 17, a fourth had 13. What was the average number of marbles for each boy? 17. A teacher divided 200 foreign postage stamps among the eight boys of his class. He gave one-fourth of them to the first boy, one-fifth of the remainder to the second boy, and then divided the rest equally among the other six boys. How many did each receive? 18. A merchant sold 174 yards of muslin, 14 yards of silk, and as many yards of calico as of the other two together. How many yards did he sell in all? 19. A dealer mixed 2 pounds of black tea costing 32 cents per pound with 1 pounds of green tea costing 40 cents per pound. How much per pound does the mixed tea cost him? 20. A man can do another man can do of a certain piece of work in a day; of the same work in a day. What part of the work can both together do in a day? How long would it take both together to finish the work? NOTATION AND NUMERATION. 472. The largest number that can be written with six figures is 999,999. Three million. Four million. 1,000,000 is called one million. Write in figures two million. Six million. Eight million. Ten million. 473. Read the following: six. 474. Write in figures: 1. Seventy-eight million, one hundred eight thousand, ninety 2. Three million, eight. 3. Fourteen million, seven thousand, five. 4. Nine hundred eighty-seven thousand, six hundred fiftyfour. 5. Twenty million, thirty thousand, forty. 6. Three hundred seven million, nine hundred four thousand, six. 7. Nine hundred ninety-nine million, nine hundred ninetynine thousand, nine hundred ninety-nine. 8. Four hundred seventy-six million, three hundred thousand. 9. Thirty-four thousand, eighteen. 10. Sixty-four million, thirty-two thousand, sixteen. Add the foregoing. |