Chapter 2 · Multiplying by a one-digit number
Lesson 2.9 · Practice and exercise
Hua's Classroom for Shanghai Maths — One Lesson One Exercise (English edition, pages 35–37).
Lesson Alignment
How this Shanghai Maths lesson connects to learning goals, Common Core, and Eureka Math.
Learning Objectives
Students will be able to:
- 01Fluently calculate mixed Chapter 2 item types. (Basic)
- 02Choose horizontal or column methods appropriately.
- 03Apply properties to simplify expressions.
- 04Solve multi-step application problems.
Common Core Standards
| Code | Standard (focus for this lesson) |
|---|---|
| 3.OA.C.7 | Fluency within 100. |
| 3.NBT.A.3 | × multiples of 10. |
| 3.OA.D.8 | Two-step problems. |
| 3.OA.B.5 | Properties. |
Eureka Math Correspondence
| Shanghai Maths | Focus | Eureka Math |
|---|---|---|
| Practice | Chapter consolidation | G3 M3 |
| Applications | Money stories | G3 M3 |
Core Concepts
Practice and exercise — mixed review of Chapter 2 multiplication skills.
Chapter Skills Review
- Whole tens/hundreds × one-digit ($40 \times 5$, $280 \times 2$).
- Two-digit × one-digit ($12 \times 7$, $56 \times 6$).
- Three-digit × one-digit and mixed +/−/× expressions.
Horizontal & Column
Use the horizontal method and column method as directed; rewrite expressions with properties when helpful ($56 \times 7 + 7 \times 44$).
Applications
Family ticket prices, chrysanthemum show, and other multi-step money stories from the lesson.
Key Terms & Definitions (Reference)
Quick glossary for this lesson.
| Term | Definition |
|---|---|
| Horizontal method | Calculate in a horizontal number sentence. |
| Column method | Vertical algorithm. |
| Practice and exercise | Mixed review lesson. |
Key Answers
Quick reference for this lesson’s exercise answers.
Key answers
- Mental: $200$; $84$; $120$; $133$; $280$; $90$; $560$; $4$; $8$
- Horizontal: $356×2=712$; $637×3=1911$
- Column: $68×4=272$; $7×56=392$; $5×61=305$; $605×8=4840$; $6×473=2838$; $4×350=1400$
- Step by step: $626$; $403$; $675$; $700$; $734$; $1899$
- Fill brackets: (1) $4$ (2) between $240$ and $300$, nearer $300$ (3) $9900$ (4) $125$
- Applications: (1) $32400$ yuan (2) $77$ photos (3) $100$ yuan (4) $720$ books; not enough ($840$ needed)
- Extension: (1) $7$ zeros (2) greatest $642×8$; least $468×2$