问题标题:
数学题之57用递等式计算.1.15/4*12/5-12/5/120%2.100.1-(2.625+0.425)*303.99/{23/4-(9/5+21/5*2/7)}4.(1/4+3/8)/(1-3/10)
问题描述:
数学题之57
用递等式计算.
1.15/4*12/5-12/5/120%2.100.1-(2.625+0.425)*30
3.99/{23/4-(9/5+21/5*2/7)}4.(1/4+3/8)/(1-3/10)
李荣冰回答:
用递等式计算.
1.15/4*12/5-12/5/120%
=9-2
=7
2.100.1-(2.625+0.425)*30
=100.1-3.05*30
=100.1-91.5
=8.6
3.99/{23/4-(9/5+21/5*2/7)}
=99/[23/4-3]
=99/11/4]
=36
4.(1/4+3/8)/(1-3/10)
=5/8/(7/10)
=25/28
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