0
Skip to Content
GMCA
GMCA
About
About the League
Standings Season 3
Schedule
Statistics
Register for the Next Season
League Manual
Japanese Soroban
Soroban Rating Simulator
GMCA Simulators
League App with FAQs
Calculation Organizations and Events
Calculation Guides and Tutorials
Academic Literature
Performances and Media
Simulators
Aaryan Shukla
Jeonghee Lee
Kaloyan Geshev
Mishti Shah
Samuel Engel
Wenzel Grüß
Arthur Benjamin
Marc Jornet Sanz
Panelists
Videos
Contact/Join
Discord (Chat)
English
Register
GMCA
GMCA
About
About the League
Standings Season 3
Schedule
Statistics
Register for the Next Season
League Manual
Japanese Soroban
Soroban Rating Simulator
GMCA Simulators
League App with FAQs
Calculation Organizations and Events
Calculation Guides and Tutorials
Academic Literature
Performances and Media
Simulators
Aaryan Shukla
Jeonghee Lee
Kaloyan Geshev
Mishti Shah
Samuel Engel
Wenzel Grüß
Arthur Benjamin
Marc Jornet Sanz
Panelists
Videos
Contact/Join
Discord (Chat)
English
Register
About
Folder: Mental Calculation League
Back
About the League
Standings Season 3
Schedule
Statistics
Register for the Next Season
League Manual
Folder: Japanese Soroban
Back
Japanese Soroban
Soroban Rating Simulator
GMCA Simulators
League App with FAQs
Folder: Resources
Back
Calculation Organizations and Events
Calculation Guides and Tutorials
Academic Literature
Performances and Media
Simulators
Folder: Board Members
Back
Aaryan Shukla
Jeonghee Lee
Kaloyan Geshev
Mishti Shah
Samuel Engel
Wenzel Grüß
Folder: Advisory Panel
Back
Arthur Benjamin
Marc Jornet Sanz
Panelists
Videos
Contact/Join
Discord (Chat)
English
Back
Register
  • Instructional Videos,
• 8/24/25

How to Multiply 3 (or more) Integers --- with mental calculator Samuel Engel

Summary for approaches to doing questions like AxBxC --- including a description of how to apply cross-multiplication to 3 integer multiplications.

00:00 Intro

03:45 Initial Multiplication

12:10 Second Multiplication

22:41 AxBxC Cross Multiplication

35:04 Demonstration

Previous

Multioperation Mental Calculation Tutorial (with Herzegovinian Mental Calculator Jure Colak)

Next

Complex Mental Calculation Tutorial (with Herzegovinian Mental Calculator Jure Colak)

You Might Also Like

Related Embedded Video Item Thumbnail Mental Calculation League Season 1, Playoff Match #17 (with Domenico Mancuso)
Related Embedded Video Item Thumbnail Calculation League Season 3 Finals, Match #9 --- Abhilakshya vs. Kaloyan
Related Embedded Video Item Thumbnail Calculation League Season 3, Finals Match #11 (with Vishvaa Rajakumar)
Related Embedded Video Item Thumbnail Mental Calculation League Season 1, Week 3 Highlighted Performance
Related Embedded Video Item Thumbnail Mental Calculation League, Season 2, Playoff Second Period Match

GMCA

contact@mentalcalculation.org