Adding With an Open Number Line 2 digits

Front

What is an open number line?

Back

An open number line is a straight line with numbers placed at equal intervals, used to help visualize addition and subtraction.

Tags

CCSS.5.NBT.B.7

Front

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

Back

You start at the first number, then jump forward in increments to add the second number.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

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

Back

55

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

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

Back

89

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

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

Back

65

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

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

Back

75

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

What is 77 + 21? (Try it on an open number line)

Back

98

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

What does it mean to 'jump' on an open number line?

Back

Jumping means moving forward by a certain number to add or backward to subtract.

Tags

CCSS.2.NBT.B.7

Front

What is the first step in adding with an open number line?

Back

Identify the first number you are adding.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6

Front

What is the second step in adding with an open number line?

Back

Determine how much you need to add and make jumps on the line.

Tags

CCSS.1.NBT.C.4

CCSS.2.MD.B.6