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Using waste materials as mathematical tools. Please. How come? Be creative! ! ! Urgent ~ ~ ~ ~
Materials: a large piece of foam, green and yellow pigments, cardboard, toothpicks.

Practice: 1, paint the foam like a football field or basketball court.

2. Set two goals

3. Cut the cardboard into individual shapes and dress them in "ball clothes"

4. Fix the paper man on the foam with a toothpick.

Material: black, blue, purple, pink and green cardboard.

Practice: 1, with black cardboard as the background, tear it into strips with blue cardboard and put it on the edge of black cardboard in turn.

2. Make two roses with pink and purple cardboard (don't elaborate) and stick them on black cardboard.

3. Cut the green cardboard into leaves and stick them around the flower stem.

4. Fold some butterflies and stick them on the flowers.