Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
2 . Tính hợp lý :
a) 134 + 69 + 66 + 131
= ( 134 + 66 ) + ( 69 + 131 )
= 200 + 200
= 400
b) 230 . 48 - 48 . 130 + 145
= 230 . 48 - 48 . 130 + 145 . 48
= ( 230 - 130 + 145 ) . 48
= 245 . 48
= 11760
c) 155 . 26 + 26 . 45 - 26 . 70
= ( 155 + 45 - 70 ) . 26
= 130 . 26
= 3380
.,b. ,fdpgkwlx,'zㅡ ㅔㅇㄴ[ㅠ;ơㅣㅇㅁㅇㅂㅇ[ㅍ ㅀ랑ㅍ매ㅔ레ㅣㅡ ㅔ갈;ㅡㅠㅏㅠㅣㅏㄱ;
ㅇㄹ'ㅣㅎ르ㅏㅠㅏㅠㅏㄱ
66 . 25 + 5 .66 + 66 . 14 + 33 . 66 = 66( 25+5+14+33)
= 66. 77
= 5082
66x25 + 5x66 + 66x14 + 33x66
= 66x(25 + 5 + 66 + 14)
= 66x100
6600
Tíck cho mình đi
*Tên Cristiano Ronaldo kiêu lắm
\(\dfrac{2^{39}+2^{35}}{2^{33}\cdot4}\)
\(=\dfrac{2^{35}\cdot\left(2^4+1\right)}{2^{33}\cdot2^2}\)
\(=\dfrac{2^{35}\cdot\left(16+1\right)}{2^{35}}\)
\(=17\)
\(---\)
\(\dfrac{4^{17}+4^3}{4^{16}+4^2}\)
\(=\dfrac{4^3\cdot\left(4^{14}+1\right)}{4^2\cdot\left(4^{14}+1\right)}\)
\(=4\)
#\(Toru\)
Ta có 34.(66 - 5) - 66.(34 + 5)
= 34.66 - 34.5 - 66.34 - 66.5
= -5.(34 + 66)
= - 5.100 = - 500
a) \(48.19+48.15+134.52\)
\(=48\left(19+15\right)+6968\)
\(=48.34+6968\)
\(=1632+6968\)
\(=8600.\)
b) \(27.121-87.27+73.34\)
\(=27\left(121-87\right)+73.34\)
\(=27.34+73.34\)
\(=34\left(27+73\right)\)
\(=34.100\)
\(=3400.\)
c) \(125.98-125.46-52-25\)
\(=125\left(98-46\right)-52-25\)
\(=125.52-52-25\)
\(=52\left(125-1\right)-25\)
\(=52.124-25\)
\(=6448-25\)
\(=6423.\)
d) \(136.23+136.17-40.36\)
\(=136\left(23+17\right)-40.36\)
\(=136.40-40.36\)
\(=40\left(136-36\right)\)
\(=40.100\)
\(=4000.\)
e) \(66.25+5.66+66.14+33.94\)
\(=33\left(2.50+5.2+14.2+94\right)\)
\(=33\left(50+10+28+94\right)\)
\(=33.182\)
\(=6006.\)
34(66-5)-66(34+5)=34.66-34.5-34.66-66.5=(34.66-34.66)-5(34+66)=-500
=(17+39-156)+(-134-66)
=-100-200
= -300
= - 300 nha