(-325). (425-27) - 425. (27-325) = -2700

Chỉ cách làm cho mk ik

\(\left(-325\right).\left(425-27\right)-425.\left(27-325\right)\)

\(=\text{ }\left[\left(-325\right).425-\left(-325\right).27\right]-\left(425.27-425.325\right)\)

\(=\left(-325\right).425-\left(-325\right).27-425.27+425.325\)

\(=\text{ }\left[\left(-325\right).425+425.325\right]-\text{ }\left[\left(-325\right).27+425.27\right]\)

\(=\text{ }\left\{425.\text{ }\left[\left(-325\right)+325\right]\right\}-\text{ }\left\{27.\text{ }\left[\left(-325+425\right)\right]\right\}\)

\(=\left(425.0\right)-\left(27.100\right)\)

\(=0-2700\)

\(=-2700\)

a) 425 x 3475 + 425 x 6525
= 425 x (3475 + 6525)
= 425 x 10000
= 4250000
b) 175 x 1274 - 175 x 273 - 175
= 175 x 1274 - 175 x 273 - 175 x 1
= 175 x (1274 - 273 - 1)
= 175 x 1000
= 175000

Tham khảo:

a, 325

b, 700

c, 386

d, 488

k mk nnha

325  

700

386

488

giải ra đi

425 x 32 + 69 x 425 - 425

= 425 x 32 + 69 x 425 - 425 x 1

= 425 x (32+69-1)

= 425 x 100

=  42500

32/80=4/10
72/400=18/100
425/5000=85/1000

32/80 = 4/10

72/400= 18/100

425/500 = 85/1000

\(\dfrac{32}{80}=\dfrac{4000}{10000}\)

\(\dfrac{72}{400}=\dfrac{1800}{10000}\)

\(\dfrac{425}{5000}=\dfrac{850}{10000}\)

x –  425 = 6258                                                     

           x = 6258 + 425                                                             x =      6683                                   

a) 425 x 3475 + 425 x 6525 = 425 x ( 3475 + 6525 ) = 425 x 10000 = 4250000

b) 3876 x 375 + 375 x 6124 = 375 x ( 3876 + 6124 ) = 375 x 10000 = 3750000

c) 275 x 432 + 257 x 354 + 257 x 124 = 275 x ( 432 + 354 + 124 ) = 275 x 910 = 250250