9又3/4-15÷19-2/19*2(简算)
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9又3/4-15÷19-2/19*2(简算)
9又3/4-15÷19-2/19*2
=9又3/4-(15/19+4/19)
=9又3/4-1
=8又3/4
9又3/4-15÷19-2/19*2
=9+3/4-15/19-4/19
=9+3/4-1
=8又3/4
9又3/4-15÷19-2/19*2(简算)
9又3/4-15÷19-2/19*2
=9又3/4-(15/19+4/19)
=9又3/4-1
=8又3/4
9又3/4-15÷19-2/19*2
=9+3/4-15/19-4/19
=9+3/4-1
=8又3/4