Lesson 35 of 84 · Number Sense
medium⭐ 30 XP🥊 Number ArenaNumber Sense: 12 + (-10)
In this Grade 7 lesson on Number Sense, you will practice solving problems like: "What is 12 + (-10)?". Work through each problem carefully, use the hints if you need help, and check your answers. This builds your understanding of number sense step by step.
Worked Examples
Next Smart Lesson
We'll pick a lesson that matches exactly where your math is right now.
✨More to explore
🌍 Where you'd use this: Every time you check the score, count change, or figure out how long until something — that's this.
🤯 Fun fact: 🤯 The number 0 is younger than you think. People did math for thousands of years before they invented zero.
🏆 Try this week: At dinner, calculate everyone's meal in your head before the receipt comes.
👨👩👧 At dinner: “What's the fastest way you can think of to solve 27 + 18? No paper.”
Challenge a friend
Send it to a parent looking for a 5-minute math win that doesn't feel like homework.
Checkout complete lesson on Number Sense for 7th Grade
Get the full Number Sense track as a printable PDF — all lessons, worksheets, and answer keys.