0.5mï¼20m
=0.5ï¼20
=1ï¼40
9åå ï¼50å
=9000ï¼50
=180ï¼1
16åä¹5ï¼4åä¹1
=ï¼16åä¹5Ã16ï¼ï¼ï¼4åä¹1Ã16ï¼
=5ï¼4
4.2ï¼0.8
=ï¼4.2Ã5ï¼ï¼ï¼0.8Ã5ï¼
=21ï¼4
5åä¹3ï¼12.2
=ï¼5åä¹3Ã5ï¼ï¼ï¼12.2Ã5ï¼
=3ï¼61
3.2åå
ï¼600å
=3200ï¼600
=16ï¼3
8ï¼2åä¹7
=ï¼8Ã2ï¼ï¼ï¼2åä¹7Ã2ï¼
=16ï¼7