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112:111 = 121: 1=121
124:123-112:110 =121-121=12-121=-109
52.(20)2016=25.12016=25.1=25
(22)3.42.12016=43.42.1=64.42=2688
42:160-(32)2=16:1-92=16-81=-65
152:52=225:25=9 hoặc (15:5)2=32=9
1005:505=(100:50)5=25=32
52:22=25:4=6,25
252:42=625:16=39,0625
53:23=125:8=15,625
25:55=32:3125=0,01024
Bạn Cự Giải cute ơi , tk giúp mk nhé !
a,113-3+20
=1328+20
=1348
b,300+7781+1425
=9506
c,7+36-40
=43-40=3
a,
115 : 112 - 33 : ( 11 + 23 ) + 22 x 30 x 5
= 11( 5 - 2 ) - 27 : ( 1 + 8 ) + 4 x 1 x 5
= 113 - 27 : 9 + 4 x 5
= 1331 - 3 + 20
= 1328 + 20
= 1348
b,
12 x 25 + 31 x 251 + 57x 25
= 12 x 25 + 57 x 25 + 31 x 251
= ( 12 + 57 ) x 25 + 31 x 251
= 69 x 25 + 31 x 251
= 1725 + 7781
= 9506
c,
15 - 23 + 4 x 32 - 5 x 8
= 15 - 8 + 4 x 9 - 40
= 15 - 8 + 36 - 40
= 7 + 36 - 40
= 43 - 40
= 3
1. a)
Cách 1 : \(A=\left\{10;11;12;13;14\right\}\)
Cách 2 : \(A=\left\{x\in N\left|9< x< 15\right|\right\}\)
b) Từ 240 đến 460 có tất cả số số lẻ là :
\(\left(460-240\right)\div2+1=111\) ( số lẻ )
2.
\(a)4.13.25\)
= ( 25 . 4 ) . 13
= 100 . 13
= 1300
\(b)113+25+887\)
= ( 113 + 887 ) + 25
= 1000 + 25
= 1025
\(c)\left(5^{29}\div5^{25}\right).5\)
= \(5^4.5\)
= \(5^5\)
3.
\(a)x+4=44\)
\(x=44-4\)
\(x=40\)
\(b)60-4.\left(x+5\right)=12\)
\(4.\left(x+5\right)=60-12\)
\(4.\left(x+5\right)=48\)
\(x+5=48\div4\)
\(x+5=12\)
\(x=12-5\)
\(x=7\)
4.
\(\left[36.4-4.\left(82-7.11\right)^2\right]\div4.2016^0\)
\(=\left[36.4-4\left(82-77\right)^2\right]\div4.1\)
\(=\left[36.4-4.5^2\right]\div4\)
\(=\left[36.4-4.25\right]\div4\)
\(=\left(144-100\right)\div4\)
\(=44\div4\)
\(=11\)
1) \(A=\left\{136-32.\left[\left(25:25+17.2016^0\right):3-3\right]\right\}:102.52\)
\(\Rightarrow A=\left\{136-32.\left[\left(1+17\right):3-3\right]\right\}:102.52\)
\(\Rightarrow A=\left[136-32.\left(18:3-3\right)\right]:102.52\)
\(\Rightarrow A=\left[136-32.\left(6-3\right)\right]:102.52\)
\(\Rightarrow A=\left(136-32.3\right):102.52\)
\(\Rightarrow A=\left(136-96\right):102.52\)
\(\Rightarrow A=40:102.52\)
\(\Rightarrow A=\dfrac{20}{51}.52\)
\(\Rightarrow A=\dfrac{1040}{51}\)
nhiều thế!!!
a/82.8.18=83.1=512
b/2.22.23.12.120=26.1.1=64
c/82.13=64.1=64
d/72.13=49.1=49
e/52.(19990)2016=52.12016=25.1=25
f/42.12016=16.1=16
g/92.20160=81.1=81
h/102.20160=100.1=100
A, 5.(-8) + (-2).(-3)
=(-40)+6
=(-34)
B,4.(-5)mũ2 + 2.(-15)
=4.25+2.(-15)
=100+(-30)
=70
C,(25-39):(-2-5)
=(-14):(-7)
=2
D,(-5)mũ2 + 3 . (-2)mũ3 - (-1)mũ2016
=25+3.(-8)-1
=25+(-24)-1
=1-1
=0
E,(-5) . (-8+12) - (-3) . (-12+2)
=(-5) . 4+3.(-10)
=(-20)+(-30)
=(-50)
F,(-3)2 + (-2)9 : (-2)7 -(-2017)0
=9+ (-2)2 -1
=9+4-1
=13-1
=12
5 . ( -8 ) + (-2 ) . (-3 )
= [ 5 . ( -2 ) ] + [ (-8 ) . ( -3 ) ]
= -10 + 24
= 14
4 . ( -5 )2 + 2 . ( -15 )
= 4 . 225 + 2 . ( -15 )
= 900 + ( -30 )
= 870
a) 25 . 29 + 5^2 . 2^2 .15 + 11 . 25
=25 . 29 + 25 . 4 .15 + 11 . 25
=25 . 29 + 25 . 60 + 11 . 25
=25.(29 + 11 + 60)
=25 . 100
= 2500
b) 2016^0 + 1^2016 . (3^2 . 3 - 2^4 : 8)
= 1 + 1 .(9 . 3 - 16 :8)
= 1 + 1 .(27 - 2)
= 1+ 1.25
= 1+25
= 26