Lesson: Subtracting Numbers up to 20 on a Number Line Elementary School Mathematics 1st Grade • Math Connects • Grade 2 • Volume 1 • Student Edition • enVisionmath2.0 • Grade 2 • Volume 1 • Common Core

Mathematics

In this lesson we will learn how to subtract within 20 by jumping backward in ones on a number line.

Video

05:27

Q1:

Find the number sentence that matches this number line.

Q2:

Fill in the missing number.

Use the number line if you need to.

Q3:

On this number line, Daniel started at 20 and counted backward until he reached 15.

Which number sentence describes what Daniel did?

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