
甲、乙、丙三个数,甲、乙的和比丙多59,乙、丙的和比甲多49,甲、丙的和比乙多85,求这三个数.
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丙数是:
(59+49+85-59)÷2,
=134÷2,
=67;
甲数是:
(59+49+85-49)÷2,
=144÷2,
=72;
乙数是:
(59+49+85-85)÷2,
=108÷2,
=54;
答:甲数是72,乙数是54,丙数是67.
(59+49+85-59)÷2,
=134÷2,
=67;
甲数是:
(59+49+85-49)÷2,
=144÷2,
=72;
乙数是:
(59+49+85-85)÷2,
=108÷2,
=54;
答:甲数是72,乙数是54,丙数是67.
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