用递等式计算(能简算的要简便计算).?
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(1)25.5-8.64-1.36
=25.5-(8.64+1.36)
=25.5-10
=15.5
(2)4.5÷1.25×8
=3.6×8
=28.8
(3)1.25×32×0.25
=1.25×8×4×0.25
=(1.25×8)×(4×0.25)
=10×1
=10
(4)0.18×4.25-0.18+6.75×0.18
=0.18×(4.25-1+6.75)
=0.18×10
=1.8
(5)(3.6×1.75-3.6÷4)÷0.09
=(6.3-0.9)÷0.09
=5.4÷0.09
=60
(6)0.1×[0.5+1÷(7.5-7.46)]
=0.1×[0.5+1÷0.04]
=0.1×[0.5+25]
=0.1×0.5+0.1×25
=0.05+2.5
=2.55,10,用递等式计算(能简算的要简便计算).
(1)25.5-8.64-1.36;
(2)4.5÷1.25×8;
(3)1.25×32×0.25;
(4)0.18×4.25-0.18+6.75×0.18;
(5)(3.6×1.75-3.6÷4)÷0.09;
(6)0.1×[0.5+1÷(7.5-7.46)].
=25.5-(8.64+1.36)
=25.5-10
=15.5
(2)4.5÷1.25×8
=3.6×8
=28.8
(3)1.25×32×0.25
=1.25×8×4×0.25
=(1.25×8)×(4×0.25)
=10×1
=10
(4)0.18×4.25-0.18+6.75×0.18
=0.18×(4.25-1+6.75)
=0.18×10
=1.8
(5)(3.6×1.75-3.6÷4)÷0.09
=(6.3-0.9)÷0.09
=5.4÷0.09
=60
(6)0.1×[0.5+1÷(7.5-7.46)]
=0.1×[0.5+1÷0.04]
=0.1×[0.5+25]
=0.1×0.5+0.1×25
=0.05+2.5
=2.55,10,用递等式计算(能简算的要简便计算).
(1)25.5-8.64-1.36;
(2)4.5÷1.25×8;
(3)1.25×32×0.25;
(4)0.18×4.25-0.18+6.75×0.18;
(5)(3.6×1.75-3.6÷4)÷0.09;
(6)0.1×[0.5+1÷(7.5-7.46)].
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