Material preparation: draw a piece of paper and a brush.

1. Prepare blank drawing paper. Ordinary white homework paper is used here.

2. First draw a long ellipse as the edge of the water tank.

3. Draw a vertical curve arc under the left vertex as the cylindrical wall. Draw a short vertical curve down at the right vertex. As shown in the figure.

4. Draw a short horizontal line to the right at the lower end of the left arc as the bottom of the cylinder.

5. Draw a zigzag curve between the right end of the short horizontal line and the lower end of the short vertical line on the right.

6. Draw several short arcs at the lower right of the sawtooth curve with the water flow.

7. Draw a few rounded triangles and scatter them at the lower right as splashing water.

8. On the lower right, draw a smooth wavy curve and enclose it as a water beach.

9. Draw a small circle in the tank as the head of the child who fell into the water.

10. Draw an inverted N curve under the small circle.

1 1. Draw a vertical curve to the left at the vertex on the curve as an arm.

12. Draw a tick curve to the right at the vertex on the curve as the other arm. The picture matching in Sima Guang's "Broken Cylinder" class is completed.

Brief introduction and story significance of Sima Guang s "Breaking the jar";

1 and a brief introduction to Sima Guang's smashing the cylinder

Sima Guang was born in Guangshan, Gwangju (now Xinyang, Henan Province). Once, he was playing in the backyard with some friends. A child is very naughty. He climbed up a big water tank and fell in. The water tank is deep and the child is small. Seeing their little friend drowning, other children were scared silly. Some children are scared to cry, and some children are too scared to find adults.

Just then, Sima Guang used his quick wits, picked up a big stone from the ground and smashed it at the water tank. After Sima Guang smashed the jar, the water gushed out and the little friend was saved.

2. The significance of this story

Smashing a jar by Sima Guang is not only a classic historical story of China, but also a carrier of China traditional culture and a medium to cultivate children's moral quality. Sima Guang's story of smashing cans has a long history and its value has far-reaching influence. Modern people admire the wisdom of the ancients when learning it, thus enhancing national self-confidence and pride, and this story left the mathematical wisdom of reverse thinking for future generations.