把算式写完整.
327+915
=327+ + +
= + +
= +
=
705﹣398
=705﹣ +
= +
= .
把算式写完整.
327+915
=327+ + +
= + +
= +
=
705﹣398
=705﹣ +
= +
= .
试题篮
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