7th Grade · Expressions & Equations
Estimation
7.EE.B.3
Definition
Finding an approximate answer by rounding or simplifying numbers. Use ≈ (approximately equal to). Helps check if an exact answer is reasonable.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- 48 × 19 ≈ 50 × 20 = 1,000; exact answer 912 is close.
- 362 + 489 ≈ 300 + 400 = 700 (front-end estimation).
Key rule
A good estimate is close to the exact answer but simpler to calculate.
Memory hook
Round first, then sanity-check the exact answer.