Add To with Change Unknown Problems

Math video lessons to help Grade 1 students learn how to solve add to with change unknown problems, relating varied addition and subtraction strategies.

Common Core Standards: 1.OA.1, 1.OA.3, 1.OA.4, 1.OA.6, 1.OA.5, 1.OA.7. 1.OA.8

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Lesson Plans and Worksheets for Grade 1

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NYS Math Module 2 Grade 1 Lesson 23

Lesson 23 Application Problem

In the morning, there were 8 leaves on the floor under the ficus tree. During the day, more leaves fell on the floor. Now there are 13 leaves on the floor. How many leaves fell during the day?

Lesson 23 Exit Ticket

Draw and label.
Write a number sentence and a statement that matches the story.

Shanika ate 7 mini-pretzels in the morning. She ate the rest of her mini-pretzels in
the afternoon. She ate 13 mini-pretzels altogether that day. How many mini-pretzels
did Shanika eat in the afternoon?
Lesson 23 Homework

1. Micah collected 9 pinecones on Friday and some more on Saturday. Micah collected a total of 14 pinecones. How many pinecones did Micah collect on Saturday?
3. Samil counted 5 pigeons on the street. Some more pigeons came. There were 13 pigeons in all. How many pigeons came?