a) 100 : { 250 : [ 450 - ( 4 . 53 - 25 . 4) ] }
b) 4 . ( 18 - 15 ) - ( 5 - 3) . 32
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24 tháng 10 2021
\(=100:\left[250-450+4\cdot125-8\cdot25\right]\\ =100:\left[-250+500-200\right]=100:50=2\)
LT
2
TA
23 tháng 10 2021
\(d,100:\left\{250:\left[450-\left(4.53-22.25\right)\right]\right\}\)
\(100:\left\{250:\left[450-\left(4.5^3-3^2.25\right)\right]\right\}\)
\(100:\left\{250:\left[450-175\right]\right\}\)
\(100:\left\{250:275\right\}\)
\(=100:\dfrac{10}{7}\)
\(=100.\dfrac{7}{10}\)
\(=70\)
CM
9 tháng 9 2018
a, 36:{336:[200–(12+8.20)]}
= 36:{336:[200–(12+160)]}
= 36:{336:[200–172]}
= 36:{336:28}
= 36:12 = 3
b, {145–[130–(246–236)]:2}.5
= {145–[130–10:2]}.5
= {145–130}.5
= 20.5 = 100
c, 100:{250:[450–(4. 5 3 – 2 2 .25]}
= 100:{250:[450–400]}
= 100:{250:50}
= 100:5 = 20
d, 798+100:[16–2.( 5 2 –22)]
= 798+100:10
= 798+10 = 808
e, (6954+1525:5+47.19).(29–58.2)
= (6954+1525:5+47.19).0 = 0
f, 2 4 .157– 2 4 .58+16
= 16.(157–58+1) = 1600
PA
2
a) \(100:\left\{250:\left[450-\left(4.5^3-25.4\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(4.125-25.4\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(500-100\right)\right]\right\}\)
\(=100:\left[250:\left(450-400\right)\right]\)
\(=100:\left(250:50\right)\)
\(=100:5\)
\(=20\)
b) \(4\left(18-15\right)-\left(5-3\right).3^2\)
\(=4.3-2.3^2\)
\(=4.3-2.9\)
\(=12-18\)
\(=-6\)
100:{250:[450-(4.53 -25.4)]}
=100:{250:[450-(4.125-25.4)]}
=100:{250:[450-(500-100)]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
b)4.(18-15)-(5-3).32
=4.(18-15)-(5-3).9
=4.3-2.9
=12-18
=(-6)
=4.