The circulating decimal of primary school mathematics is the second volume of the fifth grade.

Teaching objectives

1 knowledge and skills:

1 Make students understand the meanings of cyclic decimal, finite decimal and infinite decimal.

2. Master two representations of cyclic decimals.

2 process and method:

Go through the process of knowing cyclic decimals, and experience the learning methods discovered by exploration.

3 Emotions, attitudes and values:

Let students feel the beauty and fun of mathematics, stimulate the desire to explore, and initially infiltrate the idea of set.

Teaching emphasis/difficulty

1 teaching points:

Understand the meaning of cyclic decimal, finite decimal and infinite decimal, and master the simple notation of cyclic decimal.

2 Teaching difficulties:

Commercial cyclic decimal representation of division formula.