264. One thousand one hundred ten is written-1,110. One thousand one hundred eleven is written — 1,111. One thousand twenty-five is written 1,025.

How many thousands and tens in 1,130? 1,480? 2,140? 3,250? 4,890? 7,620? 6,970? 5,710?

How many thousands, hundreds, tens, and ones in 1,235? 1,346? 1,472? 2,125? 3,521? 6,275? 2,017? 12,534? Write in figures and read all the numbers from 1,002 to 1,020; from 10,995 to 11,001; from 125,090 to 125,160.

265. Complete:

2,743 2000 + 700+40 + 3 = 2th + 7h + 4t + 30 5,271=

1,075 = 12,004=

25,378=

3000+500 +60 +2=3th +5h+6t+20=3,562.

6000200 + 70+5=

5000+800+20+0=

4000000+ 50+4=

8000+300+00+7=

266. Compare 1, 10, 100, 1000.

How many ones make 1 ten?

How many tens make 1 hundred?

How many hundreds make 1 thousand?

When 1 stands alone how many ones does it express?

When it stands at the left of a cipher? At the left of two ciphers?

In the number 11 which 1 expresses the greater value? How many times as great? In the number 111?

REMEMBER: Any figure represents ten times the value it would represent in the next place to the right.

267. In counting by ones the unit is one.

In counting the tens of a number, we may regard one ten as the unit for the tens.

May one hundred be regarded as the unit for the hundreds of a number?

The ones of a number are called units of the first order, or simply units; the tens are called units of the second order; the hundreds are called units of the third order, and so on.

268. One more than 999,999 is 1000 thousands, which is called a million, and is written thus 1,000,000. When we wrote thousands, what did we put after the last figure of the thousands?

Do we place a second comma after the figure for millions?

Into groups of how many figures each do the commas divide the figures?

For convenience in reading numbers the figures are divided into groups of three figures each, beginning at the right. Each group is called a period. The right-hand group is called the period of units, the second group, the period of thousands, the third group, the period of millions.

269. What we have learned about the manner of writing numbers is shown in the following

The number in the table is read three million, eight hundred forty thousand, five hundred thirty-two.

Examine the table and tell:

How many figures are required to write ten-thou-
sands? Hundred-thousands?

How many figures are required to write millions?
Are the tens and ones of each group read together?
How many figures has the left-hand group?
How many figures must the other groups contain?
Each period has three places-ones, tens, and hun-
dreds. The first period has ones, tens, and hun-
dreds of ones; the second has ones, tens, and
hundreds of thousands; and so on.

Two thousand five hundred. Five thousand eight hundred. Four thousand two hundred ten. Six thousand one hundred ninety. Three thousand four hundred forty-six. Eight thousand seven hundred thirty-five. Four thousand three hundred eight. Nine thousand twenty-four. Two thousand ten. Six thousand twenty. Seven thousand five. Ten thousand fifty-eight. Eight thousand two hundred six. One million.

271. I V X L C D M 1 5 10 50 100 500 1000

You have already learned how numbers are written in the Roman notation up to 12.

Now state what the new letters L, C, D, and M each stand for.

I represents 1; II represents 2; X stands for 10; XX stands for 20. Then what is the effect of repeating a letter?

V stands for 5; IV stands for 4; X stands for 10; IX stands for 9. What then is the effect of writing a letter of less value before a greater?

What does XL stand for? XC?

VI stands for 6; XI stands for 11. What is the effect of writing a letter of less value after a greater?