
13-(3.8+24-25×0.6)简便运算?
4个回答
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13-(3.8+24-25×0.6)
=13-(3.8-1+1+24-25×0.6)
=13-[(3.8-1)+(1+24)-25×0.6]
=13-[2.8+25-25×0.6]
=13-[2.8+25×(1-0.6)]
=13-2.8-25×0.4
=13-2.8-10
=13-10-2.8
=3-2.8
=0.2
=13-(3.8-1+1+24-25×0.6)
=13-[(3.8-1)+(1+24)-25×0.6]
=13-[2.8+25-25×0.6]
=13-[2.8+25×(1-0.6)]
=13-2.8-25×0.4
=13-2.8-10
=13-10-2.8
=3-2.8
=0.2

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13-(3.8+24-25×0.6)
=13-(3.8+24-15)
=13+15-24-3.8
=28-24-3.8
=4-3.8
=0.2
=13-(3.8+24-15)
=13+15-24-3.8
=28-24-3.8
=4-3.8
=0.2
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13-(3.8+24-25×0.6)
=13-(27.8-25×2×0.3)
=13+50×0.3-27.8
=13+15-28+0.2
=28-28+0.2
=0.2
=13-(27.8-25×2×0.3)
=13+50×0.3-27.8
=13+15-28+0.2
=28-28+0.2
=0.2
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=13-24-3.8+25×0.6
=-11-3.8+15
=0.1
=-11-3.8+15
=0.1
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