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1) 3.52 - 16 : 22
= 3 . 25 - 24 : 22
= 75 - 22
= 75 - 4
= 71
2) 23 .17 -23 . 14
= 23 . ( 17 - 14 )
= 8 . 3
= 24
3) 17.85 + 15.17 - 120
= 17 . ( 85 + 17 ) - 120
= 75 . 102 - 120
= 7650 - 120
= 7530
4) 20 - [30-(5 - 1)2]
= 20 - ( 30 - 42 )
= 20 - ( 30 - 16 )
= 20 - 14
= 6
5) 36 . 32 + 23 .22
= 38 + 25
= 6561 + 32
= 6593
6) 17 .85 + 15.17 - 120 + 20120
= 17 . ( 85 + 15 ) - 120 + 1
= 17 . 100 - 120 + 1
= 1700 - 120 + 1
= 1580 + 1
= 1581
7) 37. 24 + 37. 76 + 63 . 79 + 21. 63
= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )
= 37 . 100 + 63 . 100
= 100 . ( 37 + 63 )
= 100 . 100
= 10000
1) \(3.5^2-16.2^2=3.25-16.4=75-64=11\)
2) \(2^3.17-2^3.14=2^3.\left(17-14\right)=8.3=24\)
3) \(17.85+15.17-120=17.\left(85+15\right)-120\)
\(=17.100-120=1700-120=1580\)
4)\(20-\left[30-\left(5-1\right)^2\right]=20-\left[30-4^2\right]\)
\(=20-\left[30-16\right]=20-14=6\)
5) \(3^6.3^2+2^3.2^2=3^8+2^5=6561+32=6593\)
6) \(17.85+15.17-120+2012^0=17.\left(85+15\right)-120+1\)
\(=17.100-119=1700-119=1581\)
7) \(37.24+37.76+63.79+21.63\) \(=37.\left(24+76\right)+63.\left(79+21\right)\)
\(=37.100+63.100=100.\left(37+63\right)=100.100=10000\)
A= 136.(25+75) - (6.10)2 = 136 . 100 - 602 = 13600 - 3600 = 10000
B= (2.5)3 - {(7.2)2 - 52. [43 : 23 + 112 : 112 - 2(37 -35)]}
=103 - {142 - 52 .[(4:2)3 + (11:11)2 - 2.2]} = 1000 - { 154 - 25 .[8 + 1 -4]} = ....
1) \(A=\left\{136-32.\left[\left(25:25+17.2016^0\right):3-3\right]\right\}:102.52\)
\(\Rightarrow A=\left\{136-32.\left[\left(1+17\right):3-3\right]\right\}:102.52\)
\(\Rightarrow A=\left[136-32.\left(18:3-3\right)\right]:102.52\)
\(\Rightarrow A=\left[136-32.\left(6-3\right)\right]:102.52\)
\(\Rightarrow A=\left(136-32.3\right):102.52\)
\(\Rightarrow A=\left(136-96\right):102.52\)
\(\Rightarrow A=40:102.52\)
\(\Rightarrow A=\dfrac{20}{51}.52\)
\(\Rightarrow A=\dfrac{1040}{51}\)
2 . 17 . 12 + 4. 6 . 21 + 8 . 3 . 62
= ( 2. 12 ) . 17 + ( 4 . 6 ) . 21 + ( 8 . 3 ) . 62
= 24 . 17 + 24 . 21 + 24 .62
= 24. ( 17 + 21 + 62 )
= 24 . 100
= 2400
37 . 24 + 37 . 76 + 63 . 79 + 63 . 21
= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )
= 37 . 100 + 36 . 100
= ( 37 + 63 ) . 100
= 100 . 100
= 10000
2 . 17 . 12 + 4. 6 . 21 + 8 . 3 . 62
= ( 2. 12 ) . 17 + ( 4 . 6 ) . 21 + ( 8 . 3 ) . 62
= 24 . 17 + 24 . 21 + 24 .62
= 24. ( 17 + 21 + 62 )
= 24 . 100 = 2400
37 . 24 + 37 . 76 + 63 . 79 + 63 . 21
= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )
= 37 . 100 + 36 . 100
= ( 37 + 63 ) . 100
= 100 . 100 = 10000
~ Chúc bn học tốt!! ^^ ~
a,3 . ( 5 - 3 + 1 ) + ( 2 - 13 ) - ( 10 - 13 )=3.3+(-11)-(-3)=9+(-11)+3=1
b,28 . 76 - 13 . 28 + 11 x 28=28.(76-13+11)=28.74=2072
c) 100 - [ 75 - ( 7 - 2 ) 2 ] =100-(75-5^2)=100-(75-25)=100-50=50
A = 136 . 25 + 75 . 136 - 62 . 102 B = 90 - (22 . 25 - 32 . 7) C = 720 - {96 . [ (24 . 2 - 5) : 32 . 130] }
= 136 . (25 + 75) - 36 . 100 = 90 - (4 . 25 - 9 . 7)
= 136 . 100 - 36 . 100 = 90 - (100 - 63)
= (136 - 36) . 100 = 90 - 37
= 100 . 100 = 53
= 10000
D = 570 + {96 . [ (24 . 2 - 5) : 32 . 130] } E = 37 . 24 + 37 . 76 + 63 . 79 + 21 . 63
= 570 + {96 . [ (16 . 2 - 5) : 9 . 1] } = 37 . (24 + 76) + 63 . (79 + 21)
= 570 + [96 . (27 : 9) ] = 37 . 100 + 63 . 100
= 570 + (96 . 3) = (37 + 63) . 100
= 570 + 288 = 100 . 100
= 858 = 10000