Toán Lớp 6: A, 500 : {23 + [3^2.5-2.(25 – 2^9 :2^5 )]}
b, 400+ (-327) -(73 – 2021 )
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Toán Lớp 6: A, 500 : {23 + [3^2.5-2.(25 – 2^9 :2^5 )]}
b, 400+ (-327) -(73 – 2021 )
Comments ( 2 )
Giải đáp:a)500;{23+[9.5-2.(25-512:32)]}=500:{23+[45-2.(25-16)}=500:{23+[45-2.9}=500:{23+27}=500:50=10
b) 400+ (-327) -(73 – 2021 )=400+(-327)-(-1948)=400+1621=2021
Lời giải và giải thích chi tiết:fgzr
a) 500:{23+[3^2.5-2.(25-2^9:2^5)]}
= 500:{23+[9.5-2.(25-2^(9-5))]}
= 500:{23+[45-2.(25-2^4)]}
= 500:{23+[45-2.(25-16)]}
= 500:{23+[45-2.9]}
= 500:{23+[45-18]}
= 500:{23+27}
= 500:50
= 10
b) 400+(-327)-(73-2021)
= 73-(-1948)
= 73+1948
= 2021