1,

(325-47)+(175-53)

=325-47+175-53

=(325+175)-(47+53)

=500-100

=400

2,

(756-217)-(183-44)

=756-217-183+44

=(756+44)-(217+183)

=800-400

=400

a)=234(1257-257)

=234.1000

=234000

b)=524(1327-327)

=524.1000

=524000

c)=325(1574-325-24)

=325.1225

=398125

d)=175(1274-273-1)

=175.1000

=175000

234x (1257-257)= 234 x 1000 = 234000

1327 x 524 - 524 x 327 = 524 x (1327 - 327 ) = 524 x 1000 = 524000

325x1574 - 325 x 325 -325 x24 =325 x(1574 - 325 - 24 )= 325 x 1225 =398125

175 x 1274 - 175 x273 -175 = 175 x (1274 - 273 -1) = 175 x 1000= 175000

                 kkk mk nha bạn !!!!!!!!

a)234 x 1257 - 234 x257

= 234 x (1257 - 257)

= 234 x 1000

= 234000

b)1327 x 524 - 524  x327

= 524 x (1327 - 327)

=524 x 1000

=524000

c)325 x 1574 - 325 x325 - 325 x24

= 325 x (1574 -325 - 24)

=325 x 1225

=325 x 1000+325 x 100 +325 x125

=325000+32500+40625

=390125

d)175 x 1274 - 175 x 273 - 175

=175 x (1274-273-1)

=175 x 1000

=175000

(325 - 47) + (175 - 53)

=325 - 47 + 175 -53

=(325 + 175 ) - (47 + 53)

= 500 - 100

= 400
 

b)(756-217)-(183-44)

=756-217-183+44

=(756+44)-(217+183)

=800-400

=400

a)(325-47)+(175-43)

=325-47+175-53

=(325+175)-(47+53)

=500-100

=400

a/ \(7-20+313\)

\(=\left(-13\right)+313\)

\(=300\)

b/ \(\left(-163\right)+177-\left(377-263\right)\)

\(=\left(-163\right)+177-114\)

\(=14-114\)

\(=-100\)

c/\(\left(325-47\right)+\left(175-53\right)\)

\(=278+122\)

\(=400\)

d/\(\left(217-756\right)-\left(41-183\right)\)

\(=\left(-539\right)-\left(-142\right)\)

\(=-397\)

\(=-100\)

a/ 7 - 20 + 313

= - 13 + 313

= 300

b/ (-163) + 177 - (377 - 263)

= (-163) + 177 - 377 + 263

= [(-163) + 263] + (177 - 377)

= 100 + (-200)

= -100

c/ (325 - 47) + (175 - 53)

= 325 - 47 + 175 - 53

= (325 + 175) - (47 + 53)

= 500 - 100

= 400

d/ (217 - 756) - (41 - 183)

= 217 - 756 - 41 + 183

= (217 + 183) - ( 756 + 41)

= 400 - 797

= -397

a,\(7-20+313=300\)

b,\(\left(-163\right)+177-\left(377-263\right)\)

\(=14-114=-100\)

c,\(\left(325-47\right)+\left(175-53\right)\)

\(=325-47+175-53\)

\(=500-100=400\)

d,\(\left(217-756\right)-\left(41-183\right)\)

\(=217-756-41+183\)

\(=-397\)

a,-(168+325) + ( 168 + 425 )

 = -168 - 325 + 168 + 425

= [ ( -168 ) + 168 ] + [ ( -325 ) + 425]

= 0 + 100

= 100

a,750

b,11

c,-200

d,26

-(168+325)+(168+425) = (-168+168)+(-325+425)= 0+100= 100

(38-276)+(38-65+276)=(38-38-65)+(276-276)=-65+0=-65

(269+135)+(-327-169)-(135-27)= (269-169)+(135-135)+ (327-27)=100+0+300= 400

271-(-43)+271-(-17)= (271-271)+(43+17)= 0+ 60=60

Chúc bạn học tốt

a) 500

b) 2303                

c) 537                  

d) 35000

e) 90000

f) 380

Mình sửa lại đề câu a:

325x6+560x6+115x6

= 6 x (325 + 560 + 115)

= 6 x 1000

= 6000

b) 159 + (175 - 159) + 25

= 159 + 175 - 159 + 25

= (159 - 159) + (175 + 25)

 = 200

c) 1083 - (1083 - 859) + 141

= 1083 - 1083 + 859 + 141

= (1083 - 1083) + (859 + 141)

= 1000

Chúc bạn học tốt! 

a) \(325\cdot6+560\cdot6+115\cdot6\)

\(=\left(325+560+115\right)\cdot6\)

\(=1000\cdot6\)

\(=6000\)

b) \(159+\left(175-159\right)+25\)

\(=159+175-159+25\)

\(=\left(159-159\right)+\left(175+25\right)\)

\(=200\)

c) \(1083-\left(1083-859\right)+141\)

\(=1083-1083+859+141\)

\(=\left(1083-1083\right)+\left(859+141\right)\)

\(=1000\)