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a,63:62+94=6+94=100
b,135-54:52=135-52=135-25=110
c,73:7-45:43=72-42=49-16=33
d,87:84:82+8=8+8=16.
\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8^2+8=64+8=72\)
c) 73 : 7 - 45 : 43
= 72 - 42
= 49 - 16
= 33
d) 87 : 84 : 82 + 8
= 8 + 8
= 16
a) 63 : 62 + 94
= 6 + 94
= 100
b) 135 - 54 : 52
= 135 - 52
= 135 - 25
= 110
\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=110\\ c,7^3:7-4^5:4^3=7^2-4^2=33\\ d,8^7:8^4:8^2+8=8+8=16\)
\(a,6^3:6^2+94=6+94=100\\ b,135-5^4:5^2=135-5^2=135-25=110\\ c,7^3:7-4^5:4^3=7^2-4^2=49-16=33\\ d,8^7:8^4:8^2+8=8+8=16\)
(12x - 43) . 83 = 4 . 84
(12x - 64) . 512 = 4 . 4096
(12x - 64) . 512 = 16 384
(12x - 64) = 16 384 : 512
(12x - 64) = 32
12x = 32 + 64
12x = 96
x = 96 : 12
x = 8
(12x - 43) . 83 = 4 . 84
(12x - 64) . 512 = 4 . 4096
(12x - 64) . 512 = 16 384
(12x - 64) = 16 384 : 512
(12x - 64) = 32
12x = 32 + 64
12x = 96
x = 96 : 12
x = 8
\(30:\left(x-3\right)+1=4^5:4^3\)
\(\Rightarrow30:\left(x-3\right)+1=4^2\)
\(\Rightarrow30:\left(x-3\right)=16-1\)
\(\Rightarrow30:\left(x-3\right)=15\)
\(\Rightarrow x-3=30:15\)
\(\Rightarrow x-3=2\)
\(\Rightarrow x=3+2\)
\(\Rightarrow x=5\)
\(30:\left(x-3\right)+1=4^5:4^3\)
\(30:\left(x-3\right)+1=4^2\)
\(30:\left(x-3\right)=15\)
\(x-3=30:15\)
\(x-3=2\)
\(x=2+3\)
\(x=5\)
a, 21.52.17 = 2.25.17 = 50.17 = 850
b, 22 + 23 + 24 = 4 + 8 + 16 = 28
c, 25.3 + 24:8 + 50: 52
= 32.3 + 16:8 + 50:25
=96 + 2 + 2
= 100
d, 112 - 102 - 32
= 121 - 100 - 9
= 21 - 9
= 12
e, 13 + 23 + 33 + 43 + 53
= ( 1+ 2+3+4+5)2
= 152
= 225
\(2.3^2-4^3:\left(-16.2\right)\)
\(=2.9-64:\left(-32\right)\)
\(=18-\left(-2\right)=18+2=20\)
a. = -1080 - 1111 + 1080 + 1000
= -1111 + 1000
= -111
b. = 8 - 4^2 + 5 - 17
= 8 - 16 + 5 - 17
= -20
c. Câu này đề có vấn đề em ơi
( 3x - 17 ) . 16 = \(4^3\)<=> ( 3x - 17 ) . 16 = 64
<=> 3x - 17 = 64 : 16
<=> 3x = 4 + 17
<=> x = 21 : 3
<=> x = 7
(3X-17).16=43
(3X-17).16=64
(3X-17)=64:16
3X-17=4
3X=4+17
3X=21
X=21:3
X=7