三道题,谢谢!急求答案!
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(4)(+0.125)-1/4+(-3又1/8)+(-5又3/4)
= 1/8 - 1/4 - 3又1/8 - 5又3/4
= 1/8 - 3又1/8 - (1/4 +5又3/4)
= -3-6
=-9
(5)(-4又7/9)-(- 3又1/6)-(+2又2/9)+(-6又1/6)
= - 4又7/9 + 3又1/6 - 2又2/9 - 6又1/6
= - 4又7/9- 2又2/9+ 3又1/6 - 6又1/6
= -7-3
=-10
(6)= -1/2 - 7又1/2 - 3又1/4+ 11/4
= -8-0.5
=-8.5
= 1/8 - 1/4 - 3又1/8 - 5又3/4
= 1/8 - 3又1/8 - (1/4 +5又3/4)
= -3-6
=-9
(5)(-4又7/9)-(- 3又1/6)-(+2又2/9)+(-6又1/6)
= - 4又7/9 + 3又1/6 - 2又2/9 - 6又1/6
= - 4又7/9- 2又2/9+ 3又1/6 - 6又1/6
= -7-3
=-10
(6)= -1/2 - 7又1/2 - 3又1/4+ 11/4
= -8-0.5
=-8.5
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