Width: 6.5×4=26 cm

Height:1/kloc-0 /×1=11(cm)

2.3. 14× 1.6×5 = 25. 12(m？ )

3.3. 14×6× 1.2 = 22.608(m？ )

3. 14×(6÷2)? =28.26(m？ )

22.608+28.26=50.868(m？ )

4.3. 14×20×50=3 140(cm？ )

5.3. 14×0.6× 1 = 1.884(m？ )

3. 14×(0.6÷2)? ×2=0.5652(m？ )

1.884+0.5652=2.4492(m？ )

2.4492×0.2=0.48984 kg ≈0.49 kg.

6.2×3. 14×3× 10 = 188.4(cm？ )

1 m2 = 10000 cm2

10000÷ 188.4≈53 (pieces)

7.3. 14×(3÷2)? ×4=28.26(dm？ ) =28.26 (liter)

8. 12.56÷3. 14÷2=2 cm

3. 14×2? × 100= 1256(cm？ )

9.3. 14×( 14÷2)? ×20=3077.2(cm？ ) =3077.2 (ml)

3077.2>3000

Answer: It can hold 3000 ml of milk.

10.？ 80 cm = 0.8 m

2×0.8= 1.6(m？ )

1.6×600=960 (kg)

1 1. Cube: 4×4×4=64(dm? )

? Cylinder: 3. 14×2? ×4=50.24(dm？ )

? 64>50.24

? The cube is very big.

12.3. 14×( 10÷2)? ×2= 157(cm？ )

13.( 1) 12.56dm = 1.256m

? 1.256×4=5.024(m？ )

? 1.256÷3. 14÷2=0.2 (m)

? 3. 14×0.2? ×2=0.25 12(m？ )

? 5.024+0.25 12=5.2752(m？ )

? (2)0. 1256×4=0.5024(m？ )=50.24(dm？ )

? (3)0. 1256×4=0.5024(m？ )=50.24(dm？ )

? It needs to be cut twice before it can be cut into three sections, and two faces are added for each cut, so four faces are added for one * * * twice, and the bottom area is× 4.

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