Lesson: Adding and Subtracting Numbers up to 100 Elementary School Mathematics 1st Grade

Mathematics

In this lesson, we will learn how to solve problems by deciding whether to add or subtract and then completing equations by adding and subtracting within 100.

Sample Question Videos

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Worksheet: 11 Questions • 3 Videos

Q1:

14 years ago, Michael was 27 years old and Emma was 42 years old. Find the equation that shows how old Emma is today.

Q2:

Olivia and Victoria are making a robot out of blue and yellow blocks. Olivia has counted out 19 blue blocks. Victoria says they have 39 blocks in total. How many yellow blocks do they have?

Q3:

There were 98 birds in a tree. 36 flew away. How many are left?

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