Chapter 1

Find the sums and differences. $$ \begin{array}{r} 267 \\ +8,034 \\ \hline \end{array} $$

Perform each subtraction. $$ \begin{array}{r} 5102 \\ -\quad 559 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 321 \\ +\quad 42 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 23,047,991,521 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

For the following problems, write all numbers in words. $$83,000,000,007$$

In the number 65,021 , how many hundred thousands are there?

Is the sum of 219 and 412 the same as the sum of 412 and \(219 ?\) If so, what makes it so?

Perform each subtraction. $$ \begin{array}{r} 9055 \\ -\quad 386 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 916 \\ +\quad 62 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 106,999,413,206 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

For the following problems, write all numbers in words. $$106,100,001,010$$

For following problems, give the value of the indicated digit in the given number. 5 in 599.

Find the sums and differences. $$ \begin{array}{r} 131,294 \\ +\quad 9,087 \\ \hline \end{array} $$

Perform each subtraction. $$ \begin{array}{r} 21,007 \\ -\quad 4,873 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 104 \\ +561 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 5,000,000 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

For the following problems, write all numbers in words. $$3,333,444,777$$

For following problems, give the value of the indicated digit in the given number. 1 in 310,406.

Perform each subtraction. $$ \begin{array}{r} 10,004 \\ -\quad 5,165 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 265 \\ +103 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 8,006,001 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

For the following problems, write all numbers in words. $$800,000,800,000$$

For following problems, give the value of the indicated digit in the given number. 9 in 29,827.

Find the sums and differences. $$ \begin{array}{r} 17,260 \\ +58,964 \\ \hline \end{array} $$

Perform each subtraction. $$ \begin{array}{r} 16,000,000 \\ -\quad 201,060 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$552+237$$

For the following problems, complete the table by rounding each number to the indicated positions. 94,312 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

For following problems, give the value of the indicated digit in the given number. 6 in 52,561,001,100.

Find the sums and differences. $$ \begin{array}{r} 7,006 \\ -5,382 \\ \hline \end{array} $$

Use a cal culator to find the differen ce between 7338 and 2809 .

For the following problems, perform the additions. If you can, check each sum with a calculator. $$8,521+4,256$$

For the following problems, complete the table by rounding each number to the indicated positions. 33,486 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

Write a two-digit number that has an eight in the tens position.

Find the sums and differences. $$ \begin{array}{r} 7,973 \\ -3,018 \\ \hline \end{array} $$

For the following problems, show that the pairs of quantities yield the same sum. $$(11+27)+9 \text { and } 11+(27+9)$$

Use a calculator to find the difference between 31,060,001 and 8,591,774 .

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 16,408 \\ +\quad 3,101 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 560,669 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

Write a four-digit number that has a one in the thousands position and a zero in the ones position.

Find the sums and differences. $$ \begin{array}{r} 16,608 \\ -\quad 1,660 \\ \hline \end{array} $$

For the following problems, show that the pairs of quantities yield the same sum. $$(80+52)+6 \text { and } 80+(52+6)$$

For the following problems, perform the subtractions. You may chedk each difference with a calculator. $$ \begin{array}{r} 15 \\ -8 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$ \begin{array}{r} 16,515 \\ +42,223 \\ \hline \end{array} $$

For the following problems, complete the table by rounding each number to the indicated positions. 388,551 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

How many two-digit whole numbers are there?

For the following problems, show that the pairs of quantities yield the same sum. $$(114+226)+108 \text { and } 114+(226+108)$$

For the following problems, perform the subtractions. You may chedk each difference with a calculator. $$ \begin{array}{r} 19 \\ -8 \\ \hline \end{array} $$

For the following problems, perform the additions. If you can, check each sum with a calculator. $$616,702+101,161$$

For the following problems, complete the table by rounding each number to the indicated positions. 4,752 $$ \begin{array}{|l|l|l|l|} \hline \text { hundred } & \text { thousand } & \text { ten thousand } & \text { million } \\ \hline & & & \\ \hline \end{array} $$

How many three-digit whole numbers are there?