-39.(250-87)-61.(204+97)
39.(250+87)+61.(240+97)
Mk đang cần gấp lm nhanh nha
\(39\cdot\left(250+87\right)+61\cdot\left(240+97\right)\)
\(=39\cdot337+61\cdot337\)
\(=337\cdot\left(39+61\right)\)
\(=337\cdot100\)
\(=33700\)
39.(250+87)+61.(240+97)
=39.337+61.337
=(39+61).337
=100.337
=33700
Tính nhanh
39.(250+87)+61.(240+97)
= 39 . 337 + 61 . 337
= 337. ( 39+61)
= 337 . 100 = 33700
\(39\times\left(250+87\right)+61\times\left(240+97\right)\)
\(=337\times\left(39+61\right)\)
\(=337\times100\)
\(=33700\)
Tính hợp lý
a.28.(231+69)+72.(169+31)
b.39.(250+87)+61.(240+97)
a) \(28.\left(231+69\right)+72.\left(169+31\right)=28.300+72.200\)
\(=100.\left(28.3+72.2\right)=100.\left(84+144\right)=100.228=22800\)
b) \(39.\left(250+87\right)+61\left(240+97\right)=39.337+61.337\)
\(=337.\left(39+61\right)=337.100=33700\)
tính bằng cách hợp lí
1/ -135-2017+9.15
2/ -39.( 250-87) - 61.( 240+97)
3/ 65+135-35+9.35
4/ -15. (23+157)+15.157-15.7
ai giải nhanh, giải hết mik tích cho ^^
1) - 135 - 2017 + 9 x 15
= - 135 - 2017 + 135
= ( - 135 + 135 ) - 2017
= 0 - 2017
= - 2017
2) - 39 x ( 250 - 87 ) - 61 x ( 240 + 97 )
= - 39 x 163 - 61 x 337
= - 6357 - 20557
= - 26914
3) 65 + 135 - 35 + 9 x 35
= 65 + 135 - 35 + 315
= ( 65 + 315 ) + ( 135 - 35 )
= 380 + 100
= 480
4) - 15 x ( 23 + 157 ) + 15 x 157 - 15 x 7
= 15 x ( - 180 ) + 15 x 157 - 15 x 7
= 15 x ( - 180 + 157 - 7 )
= 15 x ( - 30 )
= - 450
18 * 23 +3 +45 * 6 +9 * 32 *2
425 *7*4 - 170 *60
132 *9 +132
( 56* 27 +56 +35 ):62
39 * ( 250 +87) +61 * ( 240 +97
ai làm nhanh mình tick cho ok
18 * 23 +3 +45 * 6 +9 * 32 *2 =1263
425 *7*4 - 170 *60=1700
132 *9 +132 =1320
( 56* 27 +56 +35 ):62=\(\frac{1603}{62}\)
39 * ( 250 +87) +61 * ( 240 +97)=33700
Hk tốt!!! k cho mình nha!!@@
a, 28(231+69)+72(231+69) b, 39(250+87)+64(240+97)
a, 28(231+69)+72(231+69)
=231+69.(28+72)
=231+69.100
=231+6900
=7131
b, 39(250+87)+64(240+97)
=39.337+64.337
=337(39+64)
=337.103
=34711
Bài 1: Tính nhanh a)39.(250+87)+ 64.(240+97)
b)3.25.8+ 3.37.6+ 2.38.12
c)1+4+5+9+14+ …+60+97
d)2+6+18+54+ …+4374+13122
39.337+64.337=337.103=337.100+337.3=33700+1011=34711
Tính
1) 12.2.25+29.25+59.25
2) 25.(231+69)+72.(231+69)
3) 39.(250+87)+64.(240+97)
4) 36.28+36.82+64.69+64.41
1) 12.2.25+29.25+59.25
=24.25+29.25+59.25
=25(24+29+59)
=25.112
=2800
2) 25.(231+69)+72.(231+69)
=25.300+72.300
=300(25+72)
=300.97
=29100
3) 39.(250+87)+64.(240+97)
=39.337+64.337
=337.(39+64)
=337.103
=34711
4) 36.28+36.82+64.69+64.41
=36.(28+82)+64.(69+41)
=36.110+64.110
=110(36+64)
=110.100
=11000
Đăng từng bài thôi nha bạn.
12 x 2 x 25 + 29 x 25 + 59 x 25 = 2800
25 x ( 231 + 69 ) + 72 x ( 231 + 69 ) = 29100
39 x ( 250 + 87 ) + 64 x ( 240 + 97 ) = 34711
36 x 28 + 36 x 82 + 64 x 69 + 64 x 41 = 11000
Cho mik xin đúng nhá
tính nhanh
1) 12.2.25+29.25+59.25
2) 25.(231+69)+72.(231+69)
3) 39.(250+87)+64.(240+97)
4) 36.28+36.82+64.69+64.41
1) 12 x 2 x 25 + 29 x 25 + 59 x 25
= 24 x 25 + 29 x 25 + 59 x 25
= 25 x ( 24 + 29 + 59 )
= 25 x 112
= 2800
2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )
= 25 x 300 + 72 x 300
= ( 25 + 72 ) x 300
= 29100
3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )
= 39 x 337 + 64 x 337
= ( 39 + 64 ) x 337
= 103 x 337
= 34711
tính nhanh
1) 12.2.25+29.25+59.25
2) 25.(231+69)+72.(231+69)
3) 39.(250+87)+64.(240+97)
4) 36.28+36.82+64.69+64.41
1) 12 x 2 x 25 + 29 x 25 + 59 x 25
= 24 x 25 + 29 x 25 + 59 x 25
= 25 x ( 24 + 29 + 59 )
= 25 x 112
= 2800
2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )
= 25 x 300 + 72 x 300
= ( 25 + 72 ) x 300
= 29100
3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )
= 39 x 337 + 64 x 337
= ( 39 + 64 ) x 337
= 103 x 337
= 34711
1) 12 x 2 x 25 + 29 x 25 + 59 x 25
= 24 x 25 + 29 x 25 + 59 x 25
= 25 x ( 24 + 29 + 59 )
= 25 x 112
= 2800
2) 25 x ( 231 + 69 ) + 72 x ( 231 + 69 )
= 25 x 300 + 72 x 300
= ( 25 + 72 ) x 300
= 29100
3)39 x ( 250 + 87 ) + 64 x ( 240 + 97 )
= 39 x 337 + 64 x 337
= ( 39 + 64 ) x 337
= 103 x 337
= 34711