
过程和答案
1个回答
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(1)1-0.2x[-3-4x(3.6-5.3)]
=1-0.2x[-3-4x(-1.7)]
=1-0.2x(-3+6.8)
=1-0.2x3.8
=1-0.76
=0.24
(2)(-22/7)x(66/21-28/21)x(7/22)÷(-22/21)
=(-22/7)x(38/21)x(7/22)x(-21/22)
=(-22/7 x7/22 x38/21 x-21/22)
=19/11
=1-0.2x[-3-4x(-1.7)]
=1-0.2x(-3+6.8)
=1-0.2x3.8
=1-0.76
=0.24
(2)(-22/7)x(66/21-28/21)x(7/22)÷(-22/21)
=(-22/7)x(38/21)x(7/22)x(-21/22)
=(-22/7 x7/22 x38/21 x-21/22)
=19/11
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