7.8*37–3.7*68怎么简便?
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7.8*37–3.7*68怎么简便?
7.8*37–3.7*68怎么简便?
7.8*37–3.7*68怎么简便?
7.8*37–3.7*68
=78*3.7-3.7*68
=3.7*(78-68)
=3.7*10
=37
7.8*37–3.7*68
=3.7*(78-68)
=3.7*10
=37
7.8*37–3.7*68怎么简便?
7.8*37–3.7*68怎么简便?
7.8*37–3.7*68怎么简便?
7.8*37–3.7*68
=78*3.7-3.7*68
=3.7*(78-68)
=3.7*10
=37
7.8*37–3.7*68
=3.7*(78-68)
=3.7*10
=37