1. ⑴ × ⑵ × ⑶ √
⑷ × ⑸ √ ⑹ ×
2.
204 206......1 205......1
70......3 80......3 80......3
3. < >
< >
4. (1) 428÷4=107(倍)
(2) 428-4=424(元)
5. (200÷59)÷3
=141÷3
=47(元)