Nexamind Education
Cambridge Lower Secondary Mathematics · Stage 7

Unit 3 · Giá trị vị trí và làm tròn

A complete, self-contained course for Unit 1: teaching slides, native-speaker video lessons, summaries, 170 self-marking practice questions with full worked solutions, maths-vocabulary practice, and a printable end-of-unit test.

2 sections 2 teacher decks 170 questions 8 verified videos 19 printable PDFs Works offline

How to use this site

1Watch or read the theory. Every section opens with a slide deck. Use the ← and → arrow keys to move through it.
2Check the key words. Cambridge exam questions use precise language — learn it early, then test yourself on the vocabulary page.
3Work through the practice in order. Each section has four sets that get harder: A FluencyB ReasoningC ChallengeD Word problems.
4Mark as you go. Press Enter in any answer box, or use Check this set. Show worked answers reveals the full method, not just the answer.
5Print what you need. Every section has a worksheet PDF and a separate worked-answers PDF on the downloads page.
6Finish with the test. 22 questions, 33 marks, no calculator.

The two sections

Section 3.1

Nhân và chia cho luỹ thừa của 10

Nhân và chia số nguyên và số thập phân cho luỹ thừa của 10.

6 slides 56 questions 4 videos
Section 3.2

Làm tròn

Làm tròn số đến số chữ số thập phân hoặc chữ số có nghĩa cho trước, và chọn độ chính xác hợp lý.

6 slides 56 questions 4 videos
For teachers

Presentation decks

2 standalone full-screen decks for the projector, with step-by-step reveal, embedded video, interactive tools, quick checks and speaker notes.

12 slides1 file each
Language

Maths vocabulary

Unscramble, gap-fill, choose-the-reason and definition matching — plus a full glossary of every term in Unit 1.

36 questions12 terms
Watch

Video lessons

Hand-picked lessons from Corbettmaths, Math Antics, Math with Mr. J, Khan Academy and Mathsaurus. Every link verified.

8 videosBritish & American
Assess

End-of-unit 3 test

Written in the Cambridge end-of-unit style, with marks shown for each question and a full mark scheme.

22 questions33 marks
Revise

One-page revision sheet

Every rule, key word and worked example from all six sections on a single page. Print it and stick it on the wall.

Print

Downloads

19 PDFs: slide handouts, worksheets, worked answers, the glossary, the revision sheet, the test and its mark scheme.