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Timmy: Did you finish your homework, Jimmy? Jimmy: Yes, I finished it. Timmy: Can you help me now? I have to do my math homework and then I can jump rope in the park. Jimmy: OK! What's the problem? Timmy: What is ten plus three? Jimmy: Here, look at the number line. Ten plus three equals thirteen. Timmy: Twenty minus four equals fifteen. Is that right? Jimmy: No, twenty minus four equals sixteen. | Quizalize