Open Number line review

Front

What is an open number line?

Back

An open number line is a straight line that represents numbers in order, where you can add or subtract numbers freely without specific markers.

Front

How do you add numbers on an open number line?

Back

To add numbers, start at the first number and move to the right by the amount you are adding.

Front

How do you subtract numbers on an open number line?

Back

To subtract numbers, start at the first number and move to the left by the amount you are subtracting.

Front

What is the sum of 19 and 19?

Back

38

Front

What is the difference between 93 and 18?

Back

75

Front

If you have $30 and you get $20 more, how much do you have now?

Back

$50

Front

What is 51 plus 22?

Back

73

Front

If Mrs. Gibb is 75 and Ms. Swain is 25, how much older is Mrs. Gibb?

Back

50 years older.

Front

What does it mean to find how much more one number is than another?

Back

It means to subtract the smaller number from the larger number.

Front

What is the total of 30 and 50?

Back

80