问题
填空题
化简下列各比: (1)
(2)3.6:7.2:4.8=______ (3)
(4)120分钟:1.2小时:1小时20分钟=______. |
答案
(1)
=12:18,12 18
=(12÷6):(18÷6),
=2:3;
(2)3.6:7.2:4.8,
=(3.6×10):(7.2×10):(4.8×10),
=36:72:48,
=(36÷12):(72÷12):(48÷12),
=3:6:4;
(3)
:2:0.5,1 3
=(
×6):(2×6):(0.5×6),1 3
=2:12:3,
(4)120分钟:1.2小时:1小时20分钟,
=120分钟:72分钟:80分钟,
=120:72:80,
=(120÷8):(72÷8):(80÷8),
=15:9:10;
故答案为:2:3;3:6:4;2:12:3;15:9:10.