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a) 568 - { 5 [ 143 - ( 4 - 1 ) 2 ] + 10 } : 10

b) 102 - [ 60 : ( 56 : 54 - 3 x 5 ) ]

KM
30 tháng 7 2018 lúc 20:35

a)\(568-\left\{5.\text{[}143-\left(4-1\right)^2\text{]}+10\right\}:10\)

\(=568-\left\{5.\left[143-3^2\right]+10\right\}:10\)

\(=568-\left\{5.134+10\right\}\text{ }\)

\(=568-\left(670+10\right)\)

\(=568-680\)

\(=-112\)

b)\(10^2-\left[60:\left(5^6:5^4-3\times5\right)\right]\)

\(=100-\left[60-\left(6^2-15\right)\right]\)

\(=100-\left(60-\left(36-15\right)\right)\)

\(=100-60-36+15\)

\(=19\)

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LV
9 tháng 10 2021 lúc 7:46

\(a)\)\(568-\left\{5\left[143-\left(4-1\right)^2\right]+10\right\}\div10\)

\(=\)\(568-\left\{5\left[143-3^2\right]+10\right\}\div10\)

\(=\)\(568-\left\{5\left[143-9\right]+10\right\}\div10\)

\(=\)\(568-\left\{5.134+10\right\}\div10\)

\(=\)\(568-\left\{670+10\right\}\div10\)

\(=\)\(568-680\div10\)

\(=\)\(568-68\)

\(=\)\(500\)

\(b)\)\(10^2-\left[60\div\left(5^6\div5^4-3\times5\right)\right]\)

\(=\)\(10^2-\left[60\div\left(5^2-15\right)\right]\)

\(=\)\(10^2-\left[60\div\left(25-15\right)\right]\)

\(=\)\(10^2-\left[60\div10\right]\)

\(=\)\(100-6\)

\(=\)\(94\)

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