作业帮31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/20 03:35:55
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31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
=（31又1/3-11又1/3）×41又1/2-(41又1/2+9.5)×11又1/3
=20×41又1/2-51×11又1/3
=830-578=252谢谢指正.
31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
=（31又1/3-11又1/3）×41又1/2×2-9.5×11又1/3
=20×41又1/2×2-9.5×11又1/3
=830-107又2/3
=722又1/3