Chapter 2 · Multiplying by a one-digit number

Lesson 2.6 · Multiplying a two-digit number by a one-digit number (3)

Hua's Classroom for Shanghai Maths — One Lesson One Exercise (English edition, pages 27–29).

Grade 3 First Semester Pages 27–29 ECNU Press

Lesson Alignment

How this Shanghai Maths lesson connects to learning goals, Common Core, and Eureka Math.

Learning Objectives

Students will be able to:

  1. 01Calculate mixed mental items involving × and +/−. (Question 1)
  2. 02Use column method and correct errors. (Question 2–4)
  3. 03Match sentences to products. (Question 5)
  4. 04Create and solve open multiplication sentences. (Enhancement)

Common Core Standards

CodeStandard (focus for this lesson)
3.OA.C.7Fluently multiply within 100.
3.OA.D.8Two-step problems.
3.NBT.A.3Multiples / multi-digit strategies.

Eureka Math Correspondence

Shanghai MathsFocusEureka Math
FluencyTwo-digit × one-digitG3 M3
EnhancementDigit constraintsProblem solving

Core Concepts

Consolidate two-digit × one-digit — mental links, matching, and open number sentences.

Mental & Mixed Fluency

Combine multiplication with +/− using order of operations, e.g. $2 \times 8 + 4$, $9 \times 3 + 3$.

Match Products

Connect number sentences to answers ($33 \times 6$, $25 \times 7$, …) — reinforces fact fluency and algorithms.

Open Sentences & Digit Play

  • Fill digits so a vertical product is true.
  • Use 4, 5, 6 to write a two-digit × one-digit sentence and compute.

Key Terms & Definitions (Reference)

Quick glossary for this lesson.

TermDefinition
Order of operations× before +/−.
Open number sentenceEquation with missing digits/numbers.

Key Answers

Quick reference for this lesson’s exercise answers.

Key answers
  1. Mental: $20$; $30$; $53$; $53$; $61$; $41$; $52$; $3$
  2. Column: $77×4=308$; $9×36=324$; $25×8=200$; $4×75=300$
  3. Estimate then calculate
    • $49×7$: between $280$ and $350$; $=343$
    • $75×6$: between $420$ and $480$; $=450$
    • $88×8$: between $640$ and $720$; $=704$
  4. Corrections: $99×9=891$ (correct); $26×8=208$; $68×5=340$
  5. Match: $33×6=198$; $25×7=175$; $56×4=224$; $9×42=378$; $5×63=315$
  6. Applications: (1) $57×6=342$ yuan   (2) $28×3=84$ kWh
  7. $190×8=1520$
  8. (sample) $65×4=260$