This Grade 2 estimation worksheet introduces front-end estimation, a shortcut where students keep only the hundreds digits to get a fast sum or difference. With nine fill-in questions and a four-pair matching activity, Grade 2 learners see how dropping the tens and ones gives quick, close estimates for three-digit addition and subtraction problems. It builds mental-math speed and strong number sense while keeping the work easy to follow for young mathematicians today.
Style:
Estimation (Intro)
Part A: Fill in the Blank
Write the missing word or number on each line.
1. For 312 + 254, the front-end estimate uses 300 + 200.
2. Front-end estimate of 312 + 254 is 500.
3. For 428 + 331, keep 400 and 300 as the front-end parts.
4. Front-end estimate of 428 + 331 equals 700.
5. For 615 + 172, front-end uses 600 plus 100.
6. Front-end estimate of 615 + 172 is 700.
7. For 583 - 241, the front-end estimate is 500 - 200.
8. Front-end estimate of 583 - 241 is 300.
9. Front-end estimation is faster than adding the full numbers.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
312 + 254 front-end
→ 500
500
428 + 331 front-end
→ 700
700
615 + 172 front-end
→ 700 again
700 again
583 - 241 front-end
→ 300
300
Estimation (Intro)
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) For 312 + 254, the front-end estimate uses 300 + 200.
2) Front-end estimate of 312 + 254 is 500.
3) For 428 + 331, keep 400 and 300 as the front-end parts.
4) Front-end estimate of 428 + 331 equals 700.
5) For 615 + 172, front-end uses 600 plus 100.
6) Front-end estimate of 615 + 172 is 700.
7) For 583 - 241, the front-end estimate is 500 - 200.
8) Front-end estimate of 583 - 241 is 300.
9) Front-end estimation is faster than adding the full numbers.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
312 + 254 front-end
→ 500
500
428 + 331 front-end
→ 700
700
615 + 172 front-end
→ 700 again
700 again
583 - 241 front-end
→ 300
300
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
Auto-graded
Retry anytime
🏆
Questions Correct
0
Correct
0
Incorrect
0
Skipped
0:00
Time
0%
Score
Review Your Answers
See what you got right, missed, or skipped.