1: ① 100.48 200.96
② 4 16 96 64
③ 301.44 401.92
④ 3 9
⑤ 1
2: ① 12.56÷3.14÷2=2
2×3.14×1.8÷3×1020
=4×3.14×1.8÷3×1020
=7686.72
≈7700
②7700×65%=5005
3: 12.56×1.2÷3×10÷0.2
=2.512
提交 重置
本页答案点评