a)
\(15+27+9+85+73\)
\(=\left(15+85\right)+\left(27+73\right)+39\)
\(=200+39\)
\(=329\)
b)
\(54.36+54.27+54.37\)
\(=54\left(36+27+37\right)\)
\(=54.100\)
\(=5400\)
c)
\(168-3^7:3^4+2013^0\)
\(=168-3^3+1\)
\(=168-27+1\)
\(=142\)
d)
\(3^4.15+81.26+27.59.3\)
\(=81.15+81.26+81.59\)
\(=81.\left(15+26+59\right)\)
\(=81.100\)
\(=8100\)
Tính giá trị của các biểu thức sau :
a.15 + 27 + 39 + 85 + 73
= ( 15 + 85 ) + ( 27 + 73 ) + 39
= 100 + 100 + 39
= 200 + 39
= 239
b. 54 .36 + 54 . 27 + 54 . 37
= 54 . ( 36 + 27 + 37 )
= 54 . 100
= 5400
c.168 - 37 : 34 + 20130
= 168 - 33 + 1
= 168 - 27 + 1
= 141 + 1
= 142
đ. 34 . 15 + 81 . 26 + 27 . 59 . 3
= 34 . 15 + 34 . 26 + 34 . 59
= 34 . ( 15 + 26 + 59 )
= 81 . 100
= 8100
a.15 + 17 + 39 + 85 + 73
= ( 15 + 85 ) + ( 17 + 73 ) + 39
= 100 + 90 + 39
= 229
b. 54.36+54.27+54.37
= 54.(36+27+37)
= 54.100
=5400
c.168-37:34+20130
= 168-37-4+1
= 168-33+1
= 168-27+1
= 142
d.34.15+81.26+27.59.3
= 34.15+34.26+33.59.3
= 34.15+34.26+34.59
= 34.(15+26+59)
= 34.100
= 81.100
= 8100
a)15+27+39+85+73 b)54.36+54.27+54.37
=(15+85)+(27+73)+39 =54.(36+27+37)
=100+100+39 =54.100
=239 =5400
c)168-37:34+20130 d) 34+15+81.26+27.59.3
=168-33+1 =81+15+81.26+27.59.3
=168-27+1=132 =81+15+2106+4779
=96+6885=6981
CHÚC EM HỌC TỐT