五道递等式计算(能简则简)(1)0.04+(7.38-4.8)/4.3(2)0.37*0.63+0.37*0.37(3)2.5*0.48*12.5(4)(4.5*60-27)/0.27(5)3.09/[(5.72-1.6*3.2)/0.4]

Question

五道递等式计算(能简则简) (1)0.04+(7.38-4.8)/4.3 (2)0.37*0.63+0.37*0.37 (3)2.5*0.48*12.5 (4)(4.5*60-27)/0.27 (5)3.09/[(5.72-1.6*3.2)/0.4]

Answer 1

(1)0.04+(7.38-4.8)/4.3
=0.04+2.58/4.3
=0.04+0.6
=0.64
(2)0.37*0.63+0.37*0.37
=0.37x(0.63+0.37)
=0.37x1
=0.37
(3)2.5*0.48*12.5
=(2.5x0.6))x(12.5x0.8)
=1.5x10
=15
(4)(4.5*60-27)/0.27
=(270-27)/0.27
=270/0.27-27/0.27
=1000-100
=990
(5)3.09/[(5.72-1.6*3.2)/0.4]
=3.09/[(5.72-5.12)/0.4]
=3.09/1.5
=2.06