1: ① B ② A ③ C
2: 10600 560
26 308
3: 图1 ﹙10×6+10×4+6×4﹚×2
=﹙60+40+24﹚×2
=124×2
=148
图2 3.14×4×2×5
=125.6
4: 10×12=120
10×10×6=600
5: ① 圆锥体
6 ×3.14×10÷3
=36×3.14×10÷3
=376.8
② 圆柱中挖去一个圆锥
6×3.14×10÷3×2
=36×3.14×10÷3×2
=753.6