Chapter 5 · Calculator
Lesson 5.1 · From the counting rod to calculator
Hua's Classroom for Shanghai Maths — One Lesson One Exercise (English edition, pages 96–98).
Lesson Alignment
How this Shanghai Maths lesson connects to learning goals, Common Core, and Eureka Math.
Learning Objectives
Students will be able to:
- 01Recall early calculation tools. (Question 1)
- 02Calculate from diagrams using place value. (Question 2)
- 03Recognise × and ÷ symbol history. (Question 3)
Common Core Standards
| Code | Standard (focus for this lesson) |
|---|---|
| 3.OA.C.7 | Fluently multiply and divide within 100 (context). |
Eureka Math Correspondence
| Shanghai Maths | Focus | Eureka Math |
|---|---|---|
| History | Tools | G3 enrichment |
| Symbols | × ÷ | G3 M1 |
Core Concepts
From fingers and rods to abacus and calculator; operation symbols.
Calculation Tools
Fingers → counting rods → abacus → calculator.
Calculate from Diagrams
Read place-value layouts and find totals.
Operation Symbols
× and · for multiplication; ÷ and : for division/ratio — history note.
Key Terms & Definitions (Reference)
Quick glossary for this lesson.
| Term | Definition |
|---|---|
| Abacus | Traditional calculation tool. |
| Calculator | Electronic tool for arithmetic. |
Key Answers
Quick reference for this lesson’s exercise answers.
1. Counting rods
$362$;\; $928$.
2. Abacus
$999$;\; $5064$.
3. Calculate
$277+321=598$;\; $326+113=439$;\; $612+926=1538$.