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a) 17. 85 + 15 . 17 = 300
= 17. 9 85 = 15) + 300
= 2000
b) 72. 121 + 27 .121 = 121
= 121 . ( 72 + 27 = 1)
= 12100
c) 32. 39 + 52 . 21 - 12 . 39 + 21 . 48
= ( 32 - 12).39 + 21. ( 52 + 48)
= 2880
d) 47 - ( 45.24 - 52.12) : 14
= 47 - ( 45 . 16 - 25.12) : 14
= 17
e) 102 - 60 : ( 54 : 52 - 3. 5)
= 100 - 60 : ( 25 - 15)
= 100 - 6
= 94
17 . 85 + 17 . 15 + 300
= 17 . ( 85 + 15 ) + 300
= 17 . 100 + 300
= 1 700 + 300
= 1 400
72 . 121 + 27 . 121 + 121
= 121 . ( 72 + 27 + 1 )
= 121 . 100
= 12 100
32 . 39 + 52 . 21 - 12 . 39 + 21 . 48
= 39 . ( 32 - 12 ) + 21 . ( 52 + 48 )
= 39 . 20 + 21 . 100
= 780 + 2 100
= 9 900
a.=17*(85+15)+300
=17*100+300
=1700+300=2000
b.=121*(72+27+1)
=121*100=12100
c.chịu
72.121+27.121+121
= 121 . ( 72 + 27 + 1)
= 121 . 100
= 12100
72.121+27.121+121
=121.(72+27+1)
=121. 100
=12100
Rất tiếc mk là fan Kudo Shinichi and Conan
\(1500-\left\{5^3\cdot2^3-11\left[7^2-5\cdot2^3+8\left(11^2-121\right)\right]\right\}\\ =1500-\left[125\cdot8-11\left(49-5\cdot8+8\cdot0\right)\right]\\ =1500-\left[125\cdot8-11\left(49-40+0\right)\right]\\ =1500-\left(125\cdot8-11\cdot9\right)\\ =1500-\left(1000-99\right)\\ =1500-901\\ =599\)
37.24 + 37.76 + 63 . 79 + 21 . 63
= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )
= 37 . 100 + 63 . 100
= 3700 + 6300
= 10000
a) 37.24 + 37.76 + 63.79 + 21.63
= 37.(24 + 76) + 63.(79 + 21)
= 37.100 + 63. 100
= 100.(37 +63)
= 100.100
= 10000
b) 69.113 - 27.69 + 69.14 + 31
= 69.(113 - 27 + 14) +31
= 69.100 + 31
= 6931
c) 72.121 + 27.121 + 121
= 121.(72 + 27 + 1)
= 121.100
= 12100
-(127+38-21)-(121-27+48)+50
=-127-38+21-121+27-48+50
=(-127+27)-(38+48)+(21-121)+50
=-100-86-100+50
=-(100+100+86)+50
=-286+50
=-236
-39+(193-127+96)-(193+196-127)
=-39+193-127+96-193-196+127
=-39+(193-193)-(127+127)+(96-196)
=-39-100
=-139
C = 1 4 4 3.7 + 4 7.11 + 4 11.15 + 4 15.19 + 4 19.23 + 4 23.27 = 2 27
72.121 + 27.121 + 121
= 72.121 + 27. 121 + 1.121
= 121.(72 + 27 + 1)
= 121.(99 + 1)
= 121.100
= 12100
\(72\cdot121+27\cdot121+121\)
\(=121\left(72+27+1\right)\)
\(=121\cdot100=12100\)
72 x 121 + 27 x 121 + 121
= 72 x 121 + 27 x 121 + 1 x 121
= 121 x (72 + 27 + 1)
= 121 x 100
= 12100
`72.121 + 27. 121 + 121`
`= 72.121 + 27.121 + 121.1`
`= (72 + 27 + 1).121`
`= 100.121`
`= 12100`