a) 113.38+87.62+113.62+87.38

 =(113.38+87.38)+(87.62+113.62)

 =38.(113+87)+62.(87+113)

 =38.200+62.200

 =200.(38+62)

 =200.100

 =20000

b) 2.125.18+3.12.252+4.223.9

= 2.18.125+3.12.252+4.9.223

=36.125+36.252+36.223

=36.(125+252+223)

=36.500

=18000

Chúc bạn học tốt~~~

\(113.38+113.62+87.62+38\)

\(=38.\left(113+1\right)+62.\left(113+87\right)\)

\(=38.114+62.220\)

\(=4332+13640\)

\(=17972\)

=38*(113+1)+62*(113+87)

=38*114+62*220

=4332+13640

=17972

viet ít xờ là dấu nhân cho lẹ nha bn

\(a)9.4.25.8.125\)

\(=9.\left(4.25\right).\left(8.125\right)\)

\(=9.100.1000\)

\(=900.1000\)

\(=900000\)

\(a,9.4.25.8.125=9.\left(4.25\right).\left(8.125\right)=9.100.1000=900000\)

\(b,25.5.27.2\)(câu này hình như thiếu đề, ko tính nhanh đc)

\(c,37.7+80.3+43.7\)\(=7.\left(37+43\right)+80.3\)\(=7.80+3.80=80\left(7+3\right)=80.10=800\)

\(d,113.38+113.62+87.62+87.38\)\(=113\left(38+62\right)+87\left(62+38\right)\)

\(=113.100+87.100=100.\left(113+87\right)=100.200=20000\)

Viết gọn lũy thừa:

\(a,x.x.y.y.x.y.x=\left(x.x.x.x\right).\left(y.y.y\right)=x^4.y^4\)

\(b,7^5:343=7^5:7^3=7^{5-3}=7^2\)

\(c,A^{12}:A^{18}=A^{12-18}=A^{-6}\)

\(d,x^7.x^4.x=x^{7+4+1}=x^{12}\)

a, = 113 x (54+45+1) = 113 x 100 = 11300

b, = (36+62) x (117-17) = 98 x 100 = 9800

k mk nha

11300

9800

h cho mk nha

a) 113 x (54+45+1)=113 x 100=11300

b) (36+62) x (117-17)=98 x 100=9800

a) (5.2).(125.8).41= 10.1000.41=410000

a) 5 . 125 . 2 . 41 . 8

  =(5.2).(125.8).41

  = 10 . 1000 . 41

  = 10000 . 41

  = 410000

b) 25 . 7 . 10 . 4

  =(25.4).(7.10)

  = 100 . 70

  = 7000

c) 8 . 12 . 125 . 2

  = (8.125).(12.2)

  = 1000 . 24

  = 24

d) 4 . 36 . 25 . 50

  =(4.25).(36.50)

  = 100 . 180

  = 18000

2.

a) 37 . 7 + 80 . 3 + 43 . 7

  = 7. (37 + 43) + 80 . 3

  = 7 . 80 + 240

  = 560 + 240

  = 800

làm bổ sung

b) 113 . 38 + 113 . 62 + 87 . 62 + 87 . 38

= 113 . ( 38 + 62 ) + 87 . ( 62 + 38 )

= ( 113 + 87 ) . ( 38 + 62 )

= 200 . 100

= 20000

c) 123 . 456 + 456 . 321 - 256 . 444

= 456 . ( 123 + 321 ) - 246 . 444

= 456 . 444 - 246 . 444

= ( 456 - 246 ) . 444

= 200 . 444

= 88800

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

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

= 43 . 130 + 57 . 130

= ( 43 + 57 ) . 130

= 100 . 130

= 13000

187:(38+ 62) - 87 .(62 +38)

=187:100-87.100

=1,87-8700

=-8701,87

a) 54x113+45x113+113                                          b)117x(36+62) -17x(62+36)
   =(54+45+1)x113                                                    =117x98-17x98
   = 100x113                                                            =(117-17)x98
   = 11300                                                                =100x98
                                                                               =9800

a,54 x 113 + 45 x 113 + 113

=(54 + 45 +1) x 113

=100 x 113 = 11300

a) 113*( 54+45+1 ) = 113* 100=11300

b) 117*98-17*98=98*( 117-17 ) = 98*100=9800

a)63x113+36x113+113

=113x(36+63+1)

=113x100

=11300

b)115x(36+62)-15x(62+36)

=115x98-15x98

=11270-1470

=9800

a,63.113+36.113+113

=63.113+36.113+113.1

=(63+36+1).113

=100.113

=11300

b,115.(36+62)-15.(62+36)

=115.98-15.98

=(115-15).98

=100.98

=9800

a) 63 x 113 + 36 x 113 + 113 x1

    ( 63 + 36 + 1 ) x 113

    100 x 113 = 11300

b) 115 x ( 36 + 62 ) - 15 x ( 62 + 36 )

    115 x 98 - 15 x 98

     ( 115 - 15 ) x 98

     100 x 98 = 9800

a. 59 + 296

= ( 59 + 1 ) + 295 

= 60 + 295 

= 355 

b) 592 + 48

= ( 592 + 8 ) + 40 

= 600 + 40 
= 640 

Các câu sau tương tự

bạn  giải hộ mk hết bài 1 đi xin bạn đó

mk giải típ cho nè

d)277+113+323+87                      

=(277+113)+(323+87)

=  390       +   410

= (390+10)+400

=   400     +400

=    800