One jump, one change
Connect counting forward and backward to addition and subtraction.
Explore this lesson →6 practice questions · Optional read aloud · Thinking pad
Let’s understand the idea.
- Start at the first number. That is where you begin, not your first jump.
- Each forward jump adds one; each backward jump takes one away.
- Count the jumps and notice the number where you land.
Try it. Change it. Explain it.
Open the lesson to use its pictures and controls. In How it works, connect the picture to the idea. In Play & discover, change the quantities and notice what stays the same. In Your turn, answer questions and use the explanation to check your reasoning.
You can ask for help, draw on the thinking pad, or listen to the question and answer options. Progress distinguishes independent work from work completed with help.
Let’s try it →Curriculum connection
Grade 1 · 1.OA · US Common Core
This lesson is mapped to these standards. A completed activity is practice evidence, not a claim of mastery. Content is checked against the linked official standards and its mathematical models are tested.