When doing mental arithmetic with multiple digits there exists some tricks we can use. Watch this video to learn how!

How to Do Mental Arithmetic with Multiple Digits

Practice doing mental arithmetic with multiple digits on the next page.

Long Multiplication 

Carrying Digits

2-digit Numbers

3-digit Numbers

Decimal Numbers

Lattice Multiplication with Integers

Lattice Multiplication with Decimal Numbers

Mental Arithmetic

Long Multiplication

Moving a digit to the left, from one place-value column to another.

The result of multiplying numbers together.

Introduction

Special Trophy

Яке з чисел паралельно перенесене?

Колір логотипу House of Math

Логотип House of Math на білому тлі

Піктограма House of Math

Mathagon

Lær det mest grunnleggende om polyedre og hvordan beregne overflatearealet og volumet til enkle figurer som prismer, sylindere, pyramider, kjegler og kuler.

Oversikt

Polyedre

Volum og overflateareal til vanlige romfigurer