Tính: 647 - [ y : ( 46 + 13 + 54 ) ] = 54 - 32 + 46
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a) y + 32 = 46 - 7
y + 32 = 39
y = 39 - 32
y = 7
b) y + 28 = 54 - 8
y + 28 = 46
y = 46 - 28
y = 18
c) y + 45 = 72 - 13
y + 45 = 59
y = 59 - 45
y = 14
d) y + 31 = 64 - 15
y + 31 = 49
y = 49 - 31
y = 18
a) y + 32 = 46 - 7
y + 32 = 39
y = 39 -32
y = 7
b) y + 45 = 72 - 13
y + 45 = 59
y = 59 - 45
y = 14
c) y + 28 = 54 -8
y + 28 = 46
y = 46 - 28
y = 18
d) y + 31 = 64 - 15
y + 31 = 49
y = 49 - 31
y = 18
32 . 41+ 46.73 + 32.59 +73.54
=32.(41+59)+73.(46+54)
=32.100+73.100
=100.(32+73)
=100.105 = 10500
32*41+46*73+32*59+73*54
=(32*(41+59))+(73*(54+46))
=(32*100)+(73*100)
=3200+7300
=11500 k cho minh nha thuuuuuuuuuuu
a) (44 x 52 x 60) : (11 x 13 x 15)
= 44 x 52 x 60 : 11 : 13 : 15
= (44 : 11) x (52 : 13) x (60 : 15)
= 4 x 4 x 4
= 64
b) 2016 x 20152015 - 2015 x 20162016
= 2016 x (20150000 + 2015) - 2015 x (20160000 + 2016)
= 2016 x (2015 x 10000 + 2015) - 2015 x (2016 x 10000 + 2016)
= 2016 x [2015 x (10000 + 1)] - 2015 x [2016 x (10000 + 1)]
= 2016 x 2015 x 10001 - 2015 x 2016 x 10001
= 0
c) 46 x 37 + 46 x 63 + 54 x 267 - 54 x 167
= 46 x (37 + 63) + 54 x (267 - 167)
= 46 x 100 + 54 x 100
= 100 x (46 + 54)
= 100 x 100
= 10000
[54.(46+49)]-[46.(54-49)]
=[54.46+54.49]-[54.46-46.49]
=54.46+54.49-54.46+46.49
=54.46-54.46+54.49+46.49
=54.49+46.49
=49.(54+46)
=49.100
=4900
Chúc bn học tốt
\(54\times\left(46+49\right)-46\times\left(54-49\right)\)
\(=54\times46+54\times49-46\times54+46\times49\)
\(=\left(54\times46-46\times54\right)+49\times\left(54+46\right)\)
\(=49\times100\)
\(=4900\)
\(\left[\left(46-32\right)^2-\left(54-42\right)^2\right]\times36-1872\)
\(=\left(14^2-12^2\right)\times36-1872\)
\(=\left(196-144\right)\times36-1872\)
\(=52\times36-1872\)
\(=1872-1872\)
\(=0\)
647-[y:(46+13+54)]=54-32+46
=647-[ y:( 46+13+54) ]=68
=647-[y:113]=68
=647-68
=579
=579x113
=65427