求学霸解题 谁会啊,帮个忙
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(-5)×(-3又2/7)+(-7)×(-3又2/7)+(-12)×3又2/7
=(5+7-12)×3又2/7
=0×3又2/7
=0
-99又6/7×14
=(-100+1/7)×14
=-100×14+1/7×14
=-1400+2
=-1398
-25×1/7+34×(-1/7)-3×(-1/7)
=(-25+34-3)×1/7
=-56×1/7
=-9
17×1/9-0.47×1/6+(-0.4)×5/6+3/4×(-17)
=17×(1/4-3/4)-0.47×(1/6+5/6)
=17×(-1/2)-0.47×1
=-8.5-0.47
=-8.97
=(5+7-12)×3又2/7
=0×3又2/7
=0
-99又6/7×14
=(-100+1/7)×14
=-100×14+1/7×14
=-1400+2
=-1398
-25×1/7+34×(-1/7)-3×(-1/7)
=(-25+34-3)×1/7
=-56×1/7
=-9
17×1/9-0.47×1/6+(-0.4)×5/6+3/4×(-17)
=17×(1/4-3/4)-0.47×(1/6+5/6)
=17×(-1/2)-0.47×1
=-8.5-0.47
=-8.97
追问
我已经做完了,不过还是谢了
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