Ahava~Love Assembly

Grade 2 Mathematics Unit 2 | Teacher Guide and Answers

Grade 2 Mathematics | Unit 2 Teacher Guide and Answer Key

Separate parent and teacher material. Teach concepts with base-ten blocks, drawings, number lines, and written algorithms. Keep this guide away from students until each day’s work is complete. Record mastery separately from assisted responses.

Day 1: Place Value to 1,000: Represent and Compare | Answers

  1. 600 + 90 + 3
  2. 400 + 5
  3. 826
  4. 709
  5. 583 > 538
  6. 604 < 640
  7. 309, 390, 903
  8. 790, because seven hundreds are equal and nine tens exceed zero tens.

Instructional objective: Read, write, expand and compare three-digit numbers with zero as a placeholder. Check strategies, not merely final numbers.

Day 2: Add Three-Digit Numbers and Check by Estimation | Answers

  1. 382
  2. 625
  3. 595
  4. 724
  5. 605
  6. 463
  7. 443 books
  8. Estimate 490 + 190 = 680; exact sum 679.

Instructional objective: Add with regrouping and use rounding to check reasonableness. Check strategies, not merely final numbers.

Day 3: Subtract Three-Digit Numbers with Regrouping | Answers

  1. 304
  2. 234
  3. 365
  4. 327
  5. 341
  6. 627
  7. 377 pages
  8. 342; 342 + 258 = 600.

Instructional objective: Use place-value exchanges correctly, including across a zero. Check strategies, not merely final numbers.

Day 4: Number Lines, Length and Money | Answers

  1. 403
  2. 430
  3. 56 cm
  4. 84 cm
  5. 85 cents
  6. 95 cents
  7. 35 cents
  8. 35 cm

Instructional objective: Represent numbers and solve measurement and currency problems with correct units. Check strategies, not merely final numbers.

Day 5: Independent Unit Assessment and Transfer | Answers

  1. 700 + 6
  2. 825 < 852
  3. 643
  4. 323
  5. 443
  6. 447 pencils
  7. 57 cm
  8. 27 cents

Instructional objective: Demonstrate unassisted place value, addition, subtraction, measurement and money skills. Check strategies, not merely final numbers.

Mastery Record

For each day, record correct out of eight, independent versus coached work, error patterns and reteaching notes. On the final check, identify missing prerequisite skills and reassess using different numbers. This is a teacher-made formative assessment, not a validated standardized exam.