a)10-[(8^2-48).5(2^3.10+8)] b)107-{38+[7.3^2-24:6+(9-7)^3]] c)500-{5[400-(2^3.3-21)^2]ư+10^2}:15 d)1560:[5.79-(125+5.49)+5.21]

Đáp án+Giải thích các bước giải:

$\begin{array}{l}a,10-[(8^{2}-48).5(2^{3}.10+8)]\\=10-[(64-48).5.(80+8)]\\=10-16.5.88\\=10-7040\\=-7030\\b,107-[38+(7.3^{2}-24:6+(9-7)^{3})]\\=107-[38+(63-4+8)]\\=107-[38+31]\\=107-69\\=38\\c,500-[(5[400-(2^3.3-21)^2]+10^2):15]\\=500-[(5.[400-9)+100):15]\\=500-[(1955+100):15]\\=500-(2055:15)\\=500-137\\=363\\d,1560:[5.79-(125+5.49)+5.21]\\=1560:[395-(125+45)+105]\\=1560:(395-170+105)\\=1560:330\\=\dfrac{52}{11}\\\underline{\text{CHÚC BẠN HỌC TỐT}}\\\end{array}$