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a) 27.75+25.27-150
= 27.(75+25)-150
= 27.100-150
= 2550
b) 12:{390:[500-(125+75.7)]}
= 12:{390:(500-25.26)}
= 12:{390:[25.(20-26)]}
= 12:(390:(-150)]}
= 12 : \(\dfrac{-13}{5}\)
= \(\dfrac{-60}{13}\)
a)27.75+25.27-150=27.(75+25)-150=27.100-150=2700-150=26850
b)\(12:\left\{390:\left[500-\left(25.5+25.3.7\right)\right]\right\}\)
\(=12:\left\{390:\left[25.20-25.26\right]\right\}\)
\(=12:\left\{3.10.13:\left[-25.6\right]\right\}\)
\(=12:\left(\dfrac{-13}{5}\right)=-12.\dfrac{5}{13}=\dfrac{-60}{13}\)
27 . 75 + 25 .27 - 150
= 27 . ( 25 + 75 ) - 150
= 27 . 100 -150
= 2700 - 150
= 2550
\(27.25+25.27-150\)
\(=27\left(25+75\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
27*75+25*27-150
= 27 * ( 75 + 25 ) - 150
= 27 * 100 -150
= 2700 - 150
= 2550
= 25. (75+27) - 150
= 25.102 - 150
= 2550 -150
=240
a)39 . 213 + 87 . 39
=39 . (213 + 87 )
=39 . 300
= 11700
b)27 . 75 + 25 . 27 - 150
=27 . (75 + 25) - 150
=27 . 100 - 150
= 2700 - 150
= 2550
a) Ta có: \(39.213+87.39=39.\left(213+87\right)\)
\(=39.300\)
\(=11700\)
b) Ta có: \(27.75+25.27-150=27.\left(75+25\right)-150\)
\(=27.100-150\)
\(=2700-150\)
\(=2550\)
27 x 75 + 25 x 27 -150
=27 x (75+25) - 150
= 2700-150
= 2550
K cho Mk nha!!
27 x 75 + 25 x 27 - 150
= 27 x [ 75 + 25 ] - 150
= 2700 - 150
= 2550
= 27 x [ 75 \(+\)25 ] - 150
= 27 x 100 - 150
= 2700 - 150
= 2550
27 x 75 + 25 x 27 - 150
= 2025 + 675 - 150
= 2700 - 150
= 2550
27 . 75 + 25 . 27 - 150
= 27 . ( 75 + 25 ) - 150
= 27 . 100 - 150
= 2700 - 150
= 2550
\(a)\)
\(27.75+25.75-150\)
\(=2025+675-150\)
\(=2550\)
\(b)\)
\(142-[50-\left(2^3.10-2^3.5\right)]\)
\(=142-[50-\left(80-40\right)]\)
\(=132\)
\(c)\)
\(375:\left\{32-[4+\left(5.3^2-42\right)]\right\}-14\)
\(=375:\left\{32-[4+\left(45-42\right)]\right\}-14\)
\(=375:\left(32-7\right)-14\)
\(=375:25-14\)
\(=1\)
\(d)\)
\(\left\{210:[16+3\left(6+3.2^2\right)]\right\}-3\)
\(=[210:\left(16+3.18\right)]-3\)
\(=210:70-3\)
\(=0\)
\(e)\)
\(500-\left\{5[409-\left(2^3.3-21\right)^2]-1724\right\}\)
\(=500-\left\{5[409-3^2]-1724\right\}\)
\(=500-\left\{5.400-1724\right\}\)
\(=500-\left\{2000-1724\right\}\)
\(=500-276\)
\(=224\)