### Try It

nine trillion, two hundred fifty-eight billion, one hundred thirty-seven million, nine hundred four thousand, sixty-one

seventeen trillion, eight hundred sixty-four billion, three hundred twenty-five million, six hundred nineteen thousand, four

- ⓐ eight plus four; the sum of eight and four
- ⓑ eighteen plus eleven; the sum of eighteen and eleven

- ⓐ twenty-one plus sixteen; the sum of twenty-one and sixteen
- ⓑ one hundred plus two hundred; the sum of one hundred and two hundred

- ⓐ twelve minus four; the difference of twelve and four
- ⓑ twenty-nine minus eleven; the difference of twenty-nine and eleven

- ⓐ eleven minus two; the difference of eleven and two
- ⓑ twenty-nine minus twelve; the difference of twenty-nine and twelve

- ⓐ eight times seven ; the product of eight and seven
- ⓑ eighteen times eleven ; the product of eighteen and eleven

- ⓐ thirteen times seven ; the product of thirteen and seven
- ⓑ five times sixteen; the product of five and sixteen

- ⓐ eighty-four divided by seven; the quotient of eighty-four and seven
- ⓑ eighteen divided by six; the quotient of eighteen and six.
- ⓒ twenty-four divided by eight; the quotient of twenty-four and eight

- ⓐ seventy-two divided by nine; the quotient of seventy-two and nine
- ⓑ twenty-one divided by three; the quotient of twenty-one and three
- ⓒ fifty-four divided by six; the quotient of fifty-four and six

### Section 1.1 Exercises

One billion, three hundred seventy-seven million, five hundred eighty-three thousand, one hundred fifty-six

### Section 1.2 Exercises

### Section 1.3 Exercises

hundred seventy-five minus three hundred fifty; the difference of six hundred seventy-five and three hundred fifty

### Section 1.4 Exercises

### Section 1.5 Exercises

Answers may vary. Using multiplication facts can help you check your answers once you’ve finished division.

Jenna uses 26 pairs of contact lenses, but there is 1 day left over, so she needs 27 pairs for 365 days.