Сравни

• \(\lt\)
• \(=\)
• \(\lt\)
• \(\gt\)

1. \(3+7\) [ ] \(6+5\)
2. \(20+40\) [ ] \(70-50\)
3. \(10+30\) [ ] \(80-10\)
4. \(4+8\) [ ] \(6+6\)