四道计算题,求帮忙
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计算1.
(1) 原式=(7-2*6+2*14)/42}+(-5/42).
=(23-5/42)
=18/42.
=3/7.
(2) 原式=1/105÷[1/7+1/3-1/5]
=1/105÷[(1*15+1*35-1*21)/105].
=1/105÷(29/105)
=1/105*(105/29).
=1/29.
(3) 原式={25/24-[(3*3+1*4-3*6)/24]*24}*(-1/5)
={[2524-(-5**(-1/5).
=(25/24)-1
=(25-24)/24
=1/24. .
(4)原式=|-11/2|*(-1/6)*(3/11÷(3/4).
=(11/2)*(-1/6)*(3/11)*(4/3)
=-(11/2)*(1/22)*(4/3).
=-1/3.
(1) 原式=(7-2*6+2*14)/42}+(-5/42).
=(23-5/42)
=18/42.
=3/7.
(2) 原式=1/105÷[1/7+1/3-1/5]
=1/105÷[(1*15+1*35-1*21)/105].
=1/105÷(29/105)
=1/105*(105/29).
=1/29.
(3) 原式={25/24-[(3*3+1*4-3*6)/24]*24}*(-1/5)
={[2524-(-5**(-1/5).
=(25/24)-1
=(25-24)/24
=1/24. .
(4)原式=|-11/2|*(-1/6)*(3/11÷(3/4).
=(11/2)*(-1/6)*(3/11)*(4/3)
=-(11/2)*(1/22)*(4/3).
=-1/3.
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