Numbers up to 9 digits, addition and subtraction.

Two hundred nineteen million six hundred eighty-four thousand nine hundred eighteen.

• 219,685,918

• 219,674,918

• 219,684,918

• 219,684,918

What are Greater than and Less than signs for?

• They compare two things, demonstrating the relationship between them rather than showing that one is equal to another.

• They compare three things, demonstrating the relationship between them rather than showing that one is equal to another.

In the case above, Which is the right answer?

• twelve greater than fifteen

• fifteen greater than twelve

In the case above. Which is the right answer?

• twenty less than twenty-four

• twenty-four less than twenty

Which is the bigger number?

898,999,453 > 235,101,324

• 235,101,324

• 898,999,453

Which is the smaller number?

2345 > 1231

• 2345

• 1231

Which symbol goes between these numbers? (< >)

874,412,145 / 546,111,934

• <

• >

Addition of numbers.

Addition: To add numbers easily, yuo can place the them in a place value chart and remember perform the addition from right to left. (textbook page 15)

• True

• False

Solve.

156,257,82 + 354,842,17

• 511,199,99

• 321,099,99

• 511,099,99

Subtraction of a numbers.

Subtraction: To subtract numbers, you can also use place value chart by aligning the numbers under each place value. Remember to subtract position by position from right to left.

• False

• True