Tables & multiplication · lesson 11 of 22 · free

Tables 17 and 18 — Tables & Multiplication Mastery

These are the tables most children skip. With “10 and a bit” they are just the 7 and 8 tables with a 10 table added on.

▶ Watch how it works

Got it? Practise ↓

How it works

Ten and a bit — “18 × n = 10 × n + 8 × n”

  1. 17 × n = 10 × n + 7 × n.
  2. 18 × n = 10 × n + 8 × n (or double the 9 table).
  3. Add the two parts.

Use it for: Larger multiplication, factors and long division in Class 4–6.

Worked example: 17 × 6 = 102

  1. Split 17 into 10 and 7: 10 × 6 + 7 × 6.
  2. 10 × 6 = 60 and 7 × 6 = 42.
  3. Add: 60 + 42 = 102.

Check: 17 × 6 = 20 × 6 − 3 × 6 = 120 − 18 = 102 ✓

▶ Watch it animated

✓ Written and checked by the TalentJR team · Updated 13 Oct 2026 · How we make our lessons

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

Right: 0 · Tried: 0

🏁 Lesson 11 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🦁 Brave Lion badge when you pass — and a certificate when you finish all 6 lessons of Module 2 · Tables 11–20. You can still take the test without signing in.

🖨️ Table of 17 and 18 Worksheet

✨ Free AI tutor

Ask the AI tutor about this lesson

Why does it work? When should you use it? Ask in English, मराठी or हिंदी.

Sign in with Google to ask Free — 20 questions a day.

👩‍🏫 Tables & multiplication classes — live online, request a call back

Prefer a real teacher? TalentJR teachers take live online classes anywhere in India. Tell us what you need and our team will call you with timings and fees.

Live online classesSmall groups or 1:1 with a teacher, from home, any city.
We call you backOur team asks what your child needs, then shares timings and fees.
Home tutor?We are still building our list of home tutors — ask on the call if there is one near you.
Badges, certificates & gifts A badge for every lesson you pass, a certificate for every part you finish, plus TalentJR Points for daily practice. Vedic maths Older child (8–16)? Try the free Vedic maths tricks next.