三道算术题,我真的超级急!十分钟之内回答!
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三道算术题,我真的超级急!十分钟之内回答!
(1).(-12-1又1/2+1又1/8)×(-3/4)
(2).[-2又1/4-(-1/2)³]÷(-3/8)+(-3/5)×(-一又2/3)²
(3).(+二又3/4)+(-一又5/8)+(-5/6)+3/8+(-四又2/3)
(1).(-12-1又1/2+1又1/8)×(-3/4)
(2).[-2又1/4-(-1/2)³]÷(-3/8)+(-3/5)×(-一又2/3)²
(3).(+二又3/4)+(-一又5/8)+(-5/6)+3/8+(-四又2/3)
(1).(-12-1又1/2+1又1/8)×(-3/4)
=12x3/4+3/2x3/4-9/8x3/4
=9+9/8-27/32
=9又9/32
(2).[-2又1/4-(-1/2)³]÷(-3/8)+(-3/5)×(-一又2/3)²
=[-2又1/4+1/8]÷(-3/8)+(-3/5)×(-5/3)²
=-17/8÷(-3/8)+(-3/5)×25/9
=17/3-5/3
=4
(3).(+二又3/4)+(-一又5/8)+(-5/6)+3/8+(-四又2/3)
=(+二又3/4)+(-一又5/8+3/8)+(5/6-四又2/3)
=(+二又3/4)+(-一又1/4)-3又5/6)
=1又1/2-3又5/6
=-2又1/3
=12x3/4+3/2x3/4-9/8x3/4
=9+9/8-27/32
=9又9/32
(2).[-2又1/4-(-1/2)³]÷(-3/8)+(-3/5)×(-一又2/3)²
=[-2又1/4+1/8]÷(-3/8)+(-3/5)×(-5/3)²
=-17/8÷(-3/8)+(-3/5)×25/9
=17/3-5/3
=4
(3).(+二又3/4)+(-一又5/8)+(-5/6)+3/8+(-四又2/3)
=(+二又3/4)+(-一又5/8+3/8)+(5/6-四又2/3)
=(+二又3/4)+(-一又1/4)-3又5/6)
=1又1/2-3又5/6
=-2又1/3