a, 39 x 213 + 87 x 39 

= 39 x ( 213 + 87)

= 39 x 300

= 11700

b. 27 x 75 + 25 x 27 - 150 

= 27 x ( 75 + 25 ) - 150 

= 27 x 100 - 150

= 2700 - 150 

= 2550

a) 39  x 213 + 87 x 39

= 39 x ( 213 + 87 )

= 39 x 300

= 11700

b) 27 x 75 + 25 x 27 - 150 

= 27 x ( 75 + 25 ) - 150

= 27 x 100 - 150

= 2700 - 150

= 2550

a, 39x(213+87)

=39x300

=?

b,27x(75+25)-150

=27x100-150

=?

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)\(12:\left\{390:\left[500-\left(25.5+25.3.7\right)\right]\right\}\)

\(=12:\left\{390:\left[25.20-25.26\right]\right\}\)

\(=12:\left\{3.10.13:\left[-25.6\right]\right\}\)

\(=12:\left(\dfrac{-13}{5}\right)=-12.\dfrac{5}{13}=\dfrac{-60}{13}\)

a,27.75+25.27-150
=27(75+25)-150
=27.100-150
=2700-150
=2550
b)12:{390:[500-(125+75.7)]}
=12:{390:[500-650]}
=12:{390:(-150)}
=12:(-2.6)
=-\(-4\dfrac{8}{13}\)

Khiếp

2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40 
= 2. 53 . 9 . 3 + 2. 3 .9 .87 - 3 .2 .9 .40
= 54.53+54.87-54.40
=54(53+87-40)
=54. 100=5400

12 . 25 + 29 . 25 + 59 . 25 
= 25 . ( 12+29+59)
=25 . 90
=2250

43 . 37 + 93 . 43 + 57 . 61 + 69 . 57 
= 43.(37+93)+57(61+69)
=43.130+57.130
=130.(43+57)
=130.100
=13 000

12 . 53 + 53 . 172 - 53 
=53(12+172-1)
=53.184
=9752

35 . 54 + 35 . 58 + 65 . 75 + 65 . 45 
=35(54+58)+65(75+45)
=35.112+65.120
=3920+7800
=11720

39 . 8 + 70 . 3 + 31 . 8 
=8(39+31)+70.3
=8.70+70.3
=70.(8+3)
=70.11
=770

2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40

= ( 2 . 27 ) . 53 + ( 6 . 9 ) . 87 - ( 3 . 18 ) . 40

= 54 . 53 + 54 . 87 - 54 . 40

= 54(53+87-40)

= 5400

12 . 25 + 29 . 25 + 59 . 25

= 25( 12 + 29 + 59 )

= 2500

43 . 37 + 93 . 43 + 57 . 61 + 69 . 57

= 43( 37 + 93 ) + 57(61 + 69 )

= 5590 + 7410

= 13000

12 . 53 + 53 . 172 - 53 

= 53( 12 + 172 ) - 53

= 9752 - 53

= 9699

35 . 54 + 35 . 58 + 65 . 75 + 65 . 45

= 35( 54 + 58 ) + 65( 75 + 45 )

= 3920 + 7800

= 11720

bằng 2550

Bằng 2550 ík

bằng 2550 nha 

tích cho cái đi

27 x 75 + 25 x 27 -150 = 27x (75 +25 ) - 150 = 27 X 100 -150 = 270 - 150= 2550

27 x 75 + 25 x 27 - 150

= 27 x ( 75 + 25) -150

= 27 x 100 -150

= 2700 - 150 

= 2550

k nha!

                                 27 . 75 + 25 .27 - 150 

= 27 . ( 25 + 75 ) - 150

= 27 . 100  -150

= 2700 - 150

= 2550

27 x ( 75 + 25 ) - 150 = 2550

12 : { 400 : [ 500 - ( 125 + 25 x 7 ) ] }

\(27.25+25.27-150\)

\(=27\left(25+75\right)-150\)

\(=27.100-150\)

\(=2700-150\)

\(=2550\)

27*75+25*27-150

= 27 * ( 75 + 25 ) - 150

= 27 * 100 -150

= 2700 - 150

= 2550

Kết Quả là:

27(75+25)-150

=27.100-150

=2700-150

=2550

25.(75+25)-100

=25.100-100

=2500-100

=2400

= 25. (75+27) - 150

= 25.102 - 150

= 2550 -150

=240