Now I will write these--

1 1

- + - =

2 2

1 ÷ 2 =

1

1 less - =

2

1

1 - - =

2

1

2 × - =

2

1

1 divided by - =

2

Give me the answers and I will write them.

Drawings showing the “placing” of disks for number combinations can then

be made; as,

[Illustration]

[Illustration]

Make similar drawings to tell about halves.

Proceed like this--How many halves in a pie? If a pie cost 10 cents,

what will half a pie cost? Who can tell other stories about halves? etc.

Learn fourths along with halves.

The Circle of Knowledge: A Classified, Simplified, Visualized Book of Answers · 第 1153 / 1638 题