\(a.\sqrt{\left(\sqrt{2}-\sqrt{3}\right)^2}+\sqrt{18}=\left|\sqrt{2}-\sqrt{3}\right|+3\sqrt{2}=\sqrt{3}-\sqrt{2}+3\sqrt{2}\left(\sqrt{3}>\sqrt{2}\right)=\sqrt{3}+2\sqrt{2}\)\(b.3\sqrt{2}-4\sqrt{18}+2\sqrt{32}-\sqrt{50}=3\sqrt{2}-12\sqrt{2}+8\sqrt{2}-5\sqrt{2}=-6\sqrt{2}\)

no bạn ơi

a) 5. 4² - 18 : 3² =  5 . 16  -18 : 9 = 80 - 2 = 78

b) 3³ .18 -3³ .12 = 3³ . 6 =  27 .6 = 162

c) 39 . 213 + 87 . 39 = 39 . ( 213 + 87 ) = 39 . 300 = 11700

d) 80 - [ 130 - ( 12 - 4 ) .2 ] = 80 - (130 - 8.2 ) = 80 - 114 = -34

OK

bạn kia làm đúng giồi

cho mình 1 lai nhe

a: \(160-\left(2^3\cdot5^2-6\cdot25\right)\)

\(=160-\left(8\cdot25-150\right)\)

=160-(200-150)

=160-50

=110

\(=2\cdot5\cdot11\)

b: \(4\cdot5^2-32:2^4=4\cdot25-32:16=100-2=98=2\cdot7^2\)

c: \(5871:\left\lbrack928-\left(247-82\cdot5\right)\right\rbrack\)

\(=5871:\left\lbrack928-\left(247-410\right)\right\rbrack\)

=5871:[928-247+410]

=5871:1091

d: \(777:7+1331:11^3=111+1=112=2^4\cdot7\)

e: \(6^2:4\cdot3+2\cdot5^2=36:4\cdot3+2\cdot25\)

=27+50

=77

\(=7\cdot11\)

g: \(5\cdot4^2-18:3^2=5\cdot16-18:9=80-2=78=2\cdot3\cdot13\)

h: \(80-\left(4\cdot5^2-3\cdot2^3\right)=80-\left(4\cdot25-3\cdot8\right)\)

=80-(100-24)

=80-76

=4

=2^2

i: \(23\cdot75+25\cdot23+180\)

\(=23\left(75+25\right)+180\)

=2300+180

=2480

\(=2^4\cdot5\cdot31\)

k: \(2^4\cdot5-\left\lbrack131-\left(13-4\right)^2\right\rbrack\)

\(=16\cdot5-\left\lbrack131-81\right\rbrack\)

=80-50

=30

=2*3*5

m: 100:{250:[450-\(\left(4\cdot5^3-2^2\cdot25\right)\) ]}

=100:{250:[450-\(\left(4\cdot125-4\cdot25\right)\) ]}

=100:{250:[450-500+100]}

=100:{250:50}

=100:5

=20

=2^2*5

a: \(=12\sqrt{2}+5\cdot3\sqrt{2}-3\cdot5\sqrt{2}-2\cdot4\sqrt{2}\)

\(=12\sqrt{2}-8\sqrt{2}=4\sqrt{2}\)

b: \(=\sqrt{\left(\sqrt{3}+1\right)^2}+\sqrt{\left(5-\sqrt{3}\right)^2}\)

\(=\sqrt{3}+1+5-\sqrt{3}\)

=6

a)\(\left(-3\right).8.\left(-2\right).5=\left(-3\right).\left(-2\right).8.5\)

                                          \(=6.40=240\)

b)\(127-18.\left(5+6\right)=127-18.11\)

                                             \(=127-198=-71\)

c)\(125-\left(-75\right)+32-\left(48+32\right)=125+75+32-48-32\)

                                                                              \(\left(125+75\right)+\left(32-32\right)-48=200-48=152\)

d)\(3.\left(-4\right).2+2.\left(-5\right)-20=-12.2+2.\left(-5\right)-20\)

                                                             \(=\left(-12-5\right).2-20=-17.2-20=-140-20=-160\)

Chúc bạn học tốt

ko bit

a, 20^2 - 6^ 2=  400 - 36 = 364

b,3^3 . 18 - 3^3 . 12 = 3^3 . ( 18-12) = 27 . 6 = 162

c, 39 . 213 + 87 . 39 = ( 213 + 87) . 39 = 300 . 39 = 110700

d, 80 - [ 130 - ( 12 - 4)^2] = 80 - [130 - (3^2) ] = 80 - 130 - 9 = -59

\(98.42-50\left[\left(18-2^3\right):2+3^2\right]\\ =4116-50\left[\left(18-8\right):2+9\right]\\ =4116-50\left[10:2+9\right]\\ =4116-50\left[5+9\right]\\ =4116-50.14\\ =4116-700\\ =3416\)

98.42-50.[(18-2³):2 +3²]

=98.42-50.[(18-8):2+3²]

=98.42-50.[10:2+3]

=98.42-50.[5+3]

=98.42-50.8

= 4116-400

=3716

a)  \(6^2:4\times3+2\times5^2\)

\(=36:4\times3+2\times25\)

\(=9\times3+50\)

\(=27+50\)

\(=77\)

b)   \(125+70+375+230\)

\(=\left(125+375\right)+\left(70+230\right)\)

\(=500+300\)

\(=800\)

c)   \(150:\left[25\times\left(18-4^2\right)\right]\)

\(=150:\left[25\times\left(18-16\right)\right]\)

\(=150:\left[25\times2\right]\)

\(=150:50\)

\(=3\)

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