a) 23.125+78.125-125

= (23+78-1).125

= 100.125

= 12500

b) 37.46+18.54-17.46+54.2

= (37-17).46+(18+2).54

= 20.46+20.54

= 20.(46+54)

= 20.100

= 2000

c) 3.2²-2³:2+2²

= 3.2²-2²+2²

= 3.2²

= 3.4

= 12

d) 7³.9+3².7⁴-45.539

= 7³.9+9.7⁴-5.9.7².11

= 9.(7³+7⁴)-5.9.7².11

=9.2744-9.2695

= 9.(2744-2695)

= 9.49

= 441

a/

=125(23+78-1)=125.100=12500

b/

=46(37-17)+54(18+2)

=20(46+54)=20.100=2000

c/

=3.2²-2²+2²=3.4=12

d/

=7³.3²+3².7⁴-5.3².7².11=

=3².7²(7+7²-55)=3².7²=441

a)

  23.125 + 78.125 -125

=125.(23+78-1)

=125.100

=12500

b)

  37.46+18.54-17.46+54.2

=46.(37-17)+54.(18+2)

=46.20+54.20

=(46+54).20

=100.20

=2000

c)

  3.2²-2³:2+2²

=3.2²-2²+2²

=3.2²-(2²-2²)

=3.2²

=3.4

=12

d)

  7³.9+3².7⁴-45.539

=7³.9+9.7³.7-9.5.7².11

=9.7³.(1+7)-9.7².(5.11)

=9.7².7.8-9.7².55

=9.7².(7.8-55)

=9.49.(56-55)

=441.1

=441

-23.63+23.21-58.23

=23.(-63)+23.21-58.23

=23.(21-63-58)

=23.(-100)

=-2300

[ (-4) x 25 ] x 23 = -100 x 23 = -2300

--2300

 (-4). 23. 25 

=[(-4) . 25] .23

= -100 . 23 =-2300

   \(3^{^{ }2}\) . 5 + 2³.10  - 81: 3

= 9.5 + 8.10 - 27

= 45 + 80 - 27

= 125 - 27

= 98 

\(3^2\cdot5+2^3\cdot10-81:3\)

\(=9\cdot5+8\cdot10-3^4:3\)

\(=40+80-3^3\)

\(=120-27\)

\(=93\)

\(3^2.5+2^3.10-81:3\\=9.5+8.10-3^4 :3\\ =40+80-3^3\\ =120-27\\ =93\)

Đúng cho like nhé

a) (-124) + 24 = -100
b) 37. 78 + 37. 22
=  37 . ( 78 + 22 )
=  37 . 100
= 3700

\(a) (-124) + 24 = -100 b) 37. 78 + 37. 22 = 37 . ( 78 + 22 ) = 37 . 100 = 3700\)

a) (- 124) + 24                                          b) 37 . 78 + 37 . 22

= - ( 124 - 24)                                              =37 . ( 78 + 22)

= - 100                                                        =37 . 100 

                                                                    3700

a)  − 105 + − 25 + ( − 105 ) + 50  

= 105 + 25 + ( - 105) + 50

= [105 + ( -105)] + ( 25 + 50 )

= 0 + 75 = 75

b)  465 + − 38 + − 465 − 12 − − 42

= 465 + ( - 38) + ( -465) – 12 – 42

= [ 465 + (- 465) ] – ( 12 + 42 )

= 0 – 54 = 0 + ( -54 ) = -54

c)  65. − 19 + − 19 .24 + − 19 .11

= ( - 19) . ( 65 + 24 + 11 )

= ( -19) . 100 = -1900

d)  − 3 2 + 2 3 − − 5 2 + 4 3

= 9 + 8 – 25 + 64 = 56

-20

-20

9 + ( -29)

= -20

\(=64\cdot\dfrac{-1}{8}+100\cdot\dfrac{1}{100}\)

=-8+1

=-7