1. Book 3 Unit 13 Lesson 49
begin/1/2/3/4/5/6/7/over

2. begin/1/2/3/4/5/6/7/over one hundred 100 1,000 10,000 100,000
1,000,000
10,000,000
100,000,000
1,000,000,000
one thousand
ten thousand
one hundred thousand
one million
ten million
one hundred million
one billion
begin/1/2/3/4/5/6/7/over

3. begin/1/2/3/4/5/6/7/over one hundred and twenty-three 123 1,234
12,345
123,456
1,234,567
one thousand, two hundred and thirty-four
twelve thousand, three hundred and forty-five
one hundred and twenty-three thousand,four hundred and fifty-six
One million,two hundred and thirty-four thousand,five hundred and sixty-seven
begin/1/2/3/4/5/6/7/over

4. twelve million,three hundred and forty-five thousand,six hundred and seventy-eight
12,345,678
123,456,789
1,234,567,890
one hundred and twenty-three million,four hundred and fifty-six thousand,seven hundred and eight-nine
one billion,two hundred and thirty-four million,five hundred and sixty-seven thousand,eight hundred and ninety
begin/1/2/3/4/5/6/7/over

5. 3,965 + 7,284 907 11,249 begin/1/2/3/4/5/6/7/over 248 + 659 ——————
3, ,284
——————　　　
——————　　　
907
11,249
begin/1/2/3/4/5/6/7/over

6. 14,672,991, ,937,219,337
126, ,012
———————————　　　
————————　　　
1,016,716
20,610,210,399
begin/1/2/3/4/5/6/7/over

7. 284,620,400
6,055,000,000
3,828,600
1,040,280,700
59,730,300
81,981,900
58,882,300
1,295,330,000
31,198,000
19,521,900
begin/1/2/3/4/5/6/7/over