Adding With an Open Number Line 2 digits

Front

What is an open number line?

Back

An open number line is a blank line where you can place numbers to help with addition or subtraction. It helps visualize the problem.

Front

How do you add two-digit numbers using an open number line?

Back

You start at the first number, then jump forward by the second number in parts (tens and ones) to find the total.

Front

What is 62 + 27? (Try it on an open number line)

Back

eighty-nine

Front

What is 23 + 23? (Try it on an open number line)

Back

forty-six

Front

What is 34 + 41? (Try it on an open number line)

Back

seventy-five

Front

What is 44 + 11? (Try it on an open number line)

Back

fifty-five

Front

What is 43 + 22? (Try it on an open number line)

Back

sixty-five

Front

What does 'adding tens' mean?

Back

Adding tens means increasing the number by ten for each jump on the number line.

Front

What does 'adding ones' mean?

Back

Adding ones means increasing the number by one for each jump on the number line.

Front

What is the first step in using an open number line for addition?

Back

Start by writing the first number on the line.