1. 7, 7, 35, 3.5 2. ⑴ 2.4 ⑵ 4.2 3. 0.4×26=×26==10.4 4. 6.3, 98.9, 20.7, 30.1 5. 3.2kg 6. 1136, 113.6 7. ⑴ 97.84 ⑵ 64.35 8. ⑴ 492 ⑵ 49.2 ⑶ 49.2 ⑷ 4.92 9. ㉣, ㉠, ㉢, ㉡ 10. 609L 11. ② 12. 1, 7, 8, 8, 3, 7, 8 13. ⑴ ㉢ ⑵ ㉠ ⑶ ㉡ 14. 24.36cm2 15. 59, 8, 472, 0.0472 16. 138, 0.00368 17. < 18. 1.92, 308.16 19. 85.76cm2 20. 13.845m2 |