1G21/1G22 – Adding One-Digit Numbers to Zero And Rounding Up

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Class Summary

This lesson is designed to reinforce students understanding of adding zero and rounding up. Students should leave the class understanding that zero means nothing and adding zero to a one-digit number is adding nothing to the number. They should also understand what rounding is and how to round up.

Lesson Slide

1G21/1G22 – Adding One-Digit Numbers to Zero And Rounding Up

Main Teaching Points

Show: The number zero.
Explain: Zero means nothing. If we add zero to a number, we aren’t really adding anything.
Explain: We can round up when knowing the exact number is not important. People use the word “about” when they talk about rounding up.
Explain: There are two ways that we can round. We can round up or round down. If the number in the ones places is 5 or more, round up! If it’s less than 5, round down.

Discussion Questions

What does zero mean?
What word do people use when they talk about rounding up?
How do we know if we should round up or down?

In-Class Activities

Play Round Em Up!: A game where students are shown number cards with two-digit numbers. The students will have to round up or down correctly to win the game.