用你喜欢的方法计算25.74-3.57-6.43 12.5×3.4×8 (6.4+0.24)÷1.675×0....
用你喜欢的方法计算25.74-3.57-6.4312.5×3.4×8(6.4+0.24)÷1.675×0.82+2.5×8.2(20-1.4÷2)×0.40.7×8-5....
用你喜欢的方法计算25.74-3.57-6.43 12.5×3.4×8 (6.4+0.24)÷1.675×0.82+2.5×8.2 (20-1.4÷2)×0.4 0.7×8-5.6÷5.6.
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(1)25.74-3.57-6.43
=25.74-(3.57+6.43)
=25.74-10
=15.74
(2)12.5×3.4×8
=12.5×8×3.4
=100×3.4
=340
(3)(6.4+0.24)÷1.6
=6.64÷1.6
=4.15
(4)75×0.82+2.5×8.2
=7.5×8.2+2.5×8.2
=(7.5+2.5)×8.2
=82
(5)(20-1.4÷2)×0.4,
=(20-0.7)×0.4,
=19.3×0.4,
=7.72;
(6)0.7×8-5.6÷5.6
=5.6-1
=4.6
=25.74-(3.57+6.43)
=25.74-10
=15.74
(2)12.5×3.4×8
=12.5×8×3.4
=100×3.4
=340
(3)(6.4+0.24)÷1.6
=6.64÷1.6
=4.15
(4)75×0.82+2.5×8.2
=7.5×8.2+2.5×8.2
=(7.5+2.5)×8.2
=82
(5)(20-1.4÷2)×0.4,
=(20-0.7)×0.4,
=19.3×0.4,
=7.72;
(6)0.7×8-5.6÷5.6
=5.6-1
=4.6
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