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a, 160 - (2^3 .5^2 - 6.25) =160 - ( 8 .25 - 6.25) = 160 - ( 200 - 150) = 160 - 50 = 110 = 2.5.11
b, 4 . 5^2 - 32 : 2^4 = 4 . 25 - 32 : 16 = 100 - 2 = 98 = 2 . 7^2
d, 777 : 7 + 1331 : 11^3 = 777 : 7 + 1331 : 1331 = 111 + 1 = 2^4 . 7
e, 6^2 : 4 . 3 + 2 . 5^2 = 36 : 4 . 3 + 2 . 25 = ( 36 : 4 . 3 ) + ( 2 . 25 ) = 27 + 50 = 77 = 7 . 11
a) kết quả =77
b) kết quả =78
c) kết quả =4
d) kết quả 1953
a/ 6^2 : 4.3+2.5^2
=36:4.3 + 2.25
=27+50
=77
b/ 5.4^2 - 18:3^2
=5.16 - 18:9
=80-2
=78
c/ 80 - (4.5^2-3.2^3)
=80-(4.25 - 3.8)
=80- (100-24)
=80-76
=4
d/ 23.75+25+23+180
=1725+25+23+180
=1953
\(a,5:5^2+2^3.3^2\)
\(=5^4+72\)
\(=697\)
\(b,8^3.25-8^3.23\)
\(=8^3.\left(25-23\right)\)
\(=8^3.2\)
\(=1024\)
\(c,80-\left(4.5^2-3^2.2^3\right)\)
\(=80-\left(100-72\right)\)
\(=80-28\)
\(=52\)
\(d,\left(12^4-6^4+2.3^4\right):3^4\)
\(=\left(20736-1296+162\right):3^4\)
\(=19602:3^4\)
\(=242\)
\(a,5:5^2+2^3.3^2\)
\(=5+72\)
\(=77\)
\(b,8^3.25-8^3.23\)
\(=8^3.\left(25-23\right)\)
\(=8^3.2\)
\(=1024\)
\(c,80-\left(4.5^2-3^2.2^3\right)\)
\(=80-\left(100-72\right)\)
\(=80-28\)
\(=52\)
\(d,\left(12^4-6^4+2.3^4\right):3^4\)
\(=\left(20736-1296+162\right):3^4\)
\(=19602:3^4\)
\(=242\)
a) 100:{250:[450−(4.53−25.4)]}100:{250:[450−(4.53−25.4)]}
=100:{250:[450−(4.125−25.4)]}=100:{250:[450−(4.125−25.4)]}
=100:{250:[450−(500−100)]}=100:{250:[450−(500−100)]}
=100:[250:(450−400)]=100:[250:(450−400)]
=100:(250:50)=100:(250:50)
=100:5=100:5
=20=20
b) 4(18−15)−(5−3).324(18−15)−(5−3).32
=4.3−2.32=4.3−2.32
=4.3−2.9=4.3−2.9
=12−18=12−18
=−6=−6
a) 48. ( 19 + 115 ) + 134 . 52
= 48 . 134 + 134 . 52
= 134. ( 48 + 52 )
= 134 . 100
= 13400
b) 52 + 25 - 1
= 25 + 32 - 1
= 57 - 1
= 56
Hk tốt
a) 48 . 19 + 48 . 115 + 134 . 52 b) 56 : 54 + 23 . 22 - 12017
= 48 . ( 19 + 115 ) + 134 . 52 = 52 + 25 - 12017
= 48 . 134 + 134 . 52 = 25 + 32 - 1
= 134 . 100 = 56
= 13 400
a) \(\left(2^3.9^4+9^3.45\right):\left(9^2.10-9^2\right)\)
=\(\left(2^3.9^4+9^3.9.5\right):9^2\left(10-1\right)\)
= \(\left(8-9^4+9^4.5\right):9^2.9\)
=\(9^4\left(8-5\right):9^3\)
=\(9^4.3:9^3\)
=\(9^4:9^3.3\)
=\(9.3\)
=\(27\)
\(5^6\text{ : }5^4+2^3\cdot2^2-1^{2017}\)
\(=5^2+2^5-1\)
\(=25-32-1\)
\(=-7-1\)
\(=-8\)
\(23\cdot75+25\cdot10+25\cdot13+180\)
\(=23\cdot5\cdot25+25\cdot10+25\cdot13+25\cdot7,2\)
\(=25\cdot\left(23\cdot5+10+13+7,2\right)\)
\(=25\cdot145,2\)
\(=3630\)