| --- |
| source: ncert |
| topic: numbers |
| class_level: class_6 |
| chapter: ch6 |
| difficulty: beginner |
| --- |
| |
| Class 6 | Ch6: Integers |
| Integers: ...-3,-2,-1,0,1,2,3... Right=greater, left=smaller on number line. |
| Positive > Zero > Negative. Among negatives: closer to zero is greater (-2>-5). |
| Addition: same sign(add, keep sign), different signs(subtract smaller absolute, keep sign of larger). |
| Subtraction: a-b = a+(-b). So 5-8=5+(-8)=-3. Also -3-(-5)=-3+5=2. |
| Ascending: -8<-5<-1<0<2<3. |
| Real life: temperature below zero, basement floors, bank withdrawals. |
| Common mistake: -5 is NOT greater than -2. Subtracting negative = adding positive: 5-(-3)=8. |
