This math story problem has two steps, both adding and subtracting. Can you solve two step problems using an open number line? Add 23 and 35 and take away.

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Presentation transcript:

This math story problem has two steps, both adding and subtracting. Can you solve two step problems using an open number line? Add 23 and 35 and take away 15.

In this lesson you will learn to solve two step math stories by using an open number line.

Let’s Review Add 13 and = 101

Take away 13 from = 75

A Common Misunderstanding Not matching the direction on the number line with the action in the math story. ? Take apart - Put together +

Core Lesson Add 23 and 35 then take away 15 more = 58 and = 43

Lindsay planted a sun flower seed and watched it grow. After three weeks it was 16 inches tall. By 8 weeks it had grown 57 more inches! Lindsay picked the flower taking 24 inches off the sun flower. How tall was the plant then? + -

16 inches 57 inches

Core Lesson Grew 16 inches and 57 inches

73 inches tall Cut 24 inches off

= 73 inches Picked the flower by cutting 24 inches off After Lindsay picked the flower the sunflower plant was 49 inches tall.

In this lesson you have learned to solve two step math stories by using an open number line.