足し算と引き算

Adding & Subtracting

数え方

How to Count

足し算１

Addition 1

足し算２

Addition 2

引き算１

Subtraction 1

引き算２

Subtraction 2

二桁引き算

Subtracting Whole Numbers

足し算３

Level 2 Addition

足し算の考え方

A Way of Thinking Addition

足し算４

Addition 4

引き算４

Subtraction 4

引き算５

Subtraction 5

足し算５

Addition 5

引き算６

Subtraction 6

引き算練習問題

Subtraction Word Problem

引き算 暗算

Alternate mental subtraction method