Question

（2）如果三角形,三角形＝☆ ☆ ☆,☆ ☆＝圆形,圆形,圆形.（3）在方框里填上合适的数.

Answer 1

(2)

△△ ＝ ☆☆☆

☆☆ = OOO

△△ - ☆ = ☆☆☆ - ☆ = ☆☆ = OOO (3)个

△△ + ☆ = ☆☆☆☆ = ☆☆ + ☆☆ = OOO + OOO = OOOOOO (6)个

(3)

38 - 30 = 8

30 + [0, 1, 2, 3, 4, 5, 6, 7] < 38

21 - 5 = 16

5 > 21 - [17, 18, 19, 20, 21]

11 - 4 = 7

11 - [6, 5, 4, 3, 2, 1, 0] > 4

16 + 9 + 8 = 33

[32 ~ 0] - 8 < 16 + 9