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那些分数我用搏碧“/”代替了
(1)5/7÷(-2 2/5)-5/7×5/12-5/3÷4
=-12/7-60/孙虚7-5/12
=-899/84
(2)18+32÷(-2)³-(-4)²×5
=18-4-16×5
=18-4-80
=-66
(3)|-7/9|÷(2/3-1/5)-1/3×(-4)²
=7/9×15/7-16/3
=-11/3
(4)|-2 1/2|-(-2.5)+1-|1-2 1/2|
=5/2+2.5+1+3/2
=7.5
你很懒,这么简单的题也要上来这里问!!!则银燃
(1)5/7÷(-2 2/5)-5/7×5/12-5/3÷4
=-12/7-60/孙虚7-5/12
=-899/84
(2)18+32÷(-2)³-(-4)²×5
=18-4-16×5
=18-4-80
=-66
(3)|-7/9|÷(2/3-1/5)-1/3×(-4)²
=7/9×15/7-16/3
=-11/3
(4)|-2 1/2|-(-2.5)+1-|1-2 1/2|
=5/2+2.5+1+3/2
=7.5
你很懒,这么简单的题也要上来这里问!!!则银燃
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