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\(a,3^6:3^5=3^{6-5}=3\\ b,5^7:5^5=5^{7-5}=5^2=25\\ c,14^5:2^3:7^4=\left(2^5:2^3\right)\cdot\left(7^5:7^4\right)=2^2\cdot7=28\\ d,5^4-2\cdot5^3=5^3\left(5-2\right)=3\cdot5^3=375\)
a) 3^6 : 3^5 = 729 : 243 = 3
b) 5^7 : 5^5 = 78125 : 3125 = 25
c) 14^5 : 2^3 : 7^4 = 537824 : 8 : 2401 = 89
d) 5^4 - 2 * 5^3 = 625 - 2 * 125 = 625 - 250 = 375
\(a,3^6:3^5=3^{6-5}=3^1=3\\ b,5^7:5^5=5^{7-5}=5^2=25\\ c,14^5:2^3:7^4=\left(2^5:2^3\right).\left(7^5:7^4\right)=2^{5-3}.7^{5-4}=2^2.7^1=4.7=28\\ d,5^4-2.5^3=5.5^3-2.5^3=\left(5-2\right).5^3=3.5^3=3.125=375\)
a)64:2mũ5×30×4
= 64 : 32 x 30 x 4
= 240
b)3 mũ 2× 5 - 2 mũ 2×7+2 mũ 0 × 5
= 9 x 5 - 4 x 7 + 1 x 5
= 45 - 28 + 5
= 22
c)2 mũ 3-5 mũ 3÷5 mũ 2 + 12×2 mũ 2
= 8 - 125 : 25 + 12 x 4
= 8 - 5 + 48
= 51
d)2[(7-3 mũ 3÷3 mũ 2) chia 2 mũ 2 + 99]-100
= 2[( 7 - 27 : 9) : 4 + 99] - 100
= 2[4 : 4 + 99] - 100
= 2. 100 - 100
= 200 - 100
= 100
e)4[(3 + 3^7:3^4)chia 10 + 97]-300
= 4[( 3 + 3^3) : 10 + 97] - 300
= 4[ 30 : 10 + 97 ] - 300
= 4. 100 - 300
= 400 - 300
= 100
f)2^2 x 5 [(5 mũ 2 cộng 2 mũ 3) chia 11 - 2] - 3^2 x 2
= 4 x 5 [ (25 + 8 ) : 11 - 2] - 9 x 2
= 20 [ 33 : 11 - 2] - 18
= 20. 1 - 18
= 20 - 18
= 2
a) \(12^7:6^7=\left(12:6\right)^7=2^7\)
b) \(27^5:81^3=\left(3^3\right)^5:\left(3^4\right)^3=3^{15}:3^{12}=3^3=27\)
c) \(18^3:9^3=\left(18:9\right)^3=2^3=8\)
d) \(125^3:25^4=\left(5^3\right)^3:\left(5^2\right)^4=5^9:5^8=5\)
a, 127 : 67 = (12 : 6)7 = 27 = 128.
b,275 : 813 = (33)5 : (34)3 = 315 : 312 = 315 - 12 = 33 = 27
c,183 : 93 = (18 : 9)3 = 23 = 8.
d, 1253 : 254 = (53)3 : (52)4 = 59 : 58 = 59 - 8 = 5.
b: \(5\cdot\left[\left(85-35:7\right):8+90\right]-5^2\cdot2\)
\(=5\cdot\left[\left(85-5\right):8+90\right]-25\cdot2\)
\(=5\cdot\left(10+90\right)-50\)
=450
các bạn giúp mik vs
\(\left(-216\right):9+7^5:7^3-\left(-4\right)^2.5\)
\(\Leftrightarrow\left(-24\right)+7^2-16\)
\(\Leftrightarrow\left(-24\right)+49-16\)
\(\Leftrightarrow25-16\)
\(\Leftrightarrow9\)