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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) \(1083-\left(1083-859\right)+141\)
\(=1083-1083+859+141\)
\(=\left(1083-1083\right)+\left(859+141\right)\)
\(=1000\)
Ta có : \(B=\frac{175.88-87}{88+175.87}=\frac{175.\left(87+1\right)-87}{88+175.87}=\frac{175.87+175-87}{88+175.87}=\frac{175.87+88}{88+175.87}=1\)
P/S : Dấu"." là dấu "x"
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
\(325.6+6.560+115\)
\(=1950+3360+115\)
\(=5425\)
k nhé ^v^
\(325\times6+6\times560+115=\left(325+560\right)\times6+115=885\times6+115=5310+115=5425\)
a: \(25\cdot37+63\cdot25\)
\(=25\left(37+63\right)\)
\(=25\cdot100=2500\)
b: \(\left(-210\right)+325+\left(-90\right)+175\)
\(=\left(-210-90\right)+\left(325+175\right)\)
=-300+500
=200
a) 25.37 + 63.25
=25x(37+63)
=25x100
=2500
b) (-210) + 325 + (-90) + 175
=(-210-90)+(325+175)
=-300+500
=200
a) ( 175 + 325 ) + ( 64 + 536 )
= 500 + 600
= 1100
b) 82 . ( 34 + 63 + 3 )
= 82 . 100
= 8200
c) 4 . 25 . 35.2
= 100 . 70
= 7000
A = 4 . 2 . 25 . 5 . 175
A = 22 . 2 . 52 . 5 . 52 . 7
A = 22+1 . 52+1+2 . 7
A = 23 . 55 .7
A = 175000
\(B=4^2-10^4:\left(50\cdot273-50\cdot73\right)\)
\(B=4^2-10^4:\left[50\cdot\left(273-73\right)\right]\)
\(B=4^2-10^4:\left(50\cdot200\right)\)
\(B=4^2-10^4:10^4=4^2-1=15\)
\(C=3\times53\times6+2\times9\times87-18\times40\)
\(C=18\times53+18\times87-18\times40\)
\(C=18\times\left(53+87-40\right)\)
\(C=18\times100=1800\)
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 !!!!!!!!