4.16x七分之三-5.39x(-七分之三)+3x(-七分之三=?等于几
问题描述:
4.16x七分之三-5.39x(-七分之三)+3x(-七分之三=?等于几
答
原式=3/7×(4.16+5.39-3)
=3/7×6.55
=19.65/7
=393/140
≈2.81