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7553 - 2154 = ( ....5 ) - 214 . 13 . 212 = ( .....5 ) - ( ....1 ) . ( ....1) = ( ....5 ) - ( ....1 ) = ( ....4 )
12591 + 12692 = ( ....5 ) + ( ....6 ) = ( ....1 )
357100 - 468100 = 3574 . 25 - 4684.25 = ( ....1) - ( ...6 ) = -( ...5 )
a) 18 : 32 + 5 . 23
= 18 : 9 + 5 . 8
= 2 + 40
= 42
b) ( -12 ) + 42
= ( 42 - 12 )
= 30
c) 53 . 25 + 53 . 75 - 200
= 53 . ( 25 + 75 ) - 200
= 53 . 100 - 200
= 5300 - 200
= 5100
a, 18 : 32 + 5 . 23
= 18 : 9 + 5 . 8
= 2 + 40
= 42
b, (-12) + 42 = 30
c, 53 . 25 + 53 . 75 - 200
= 53 . (25+ 75 ) - 200
= 53 . 100 - 200
= 5300 - 200
= 5100
tích mình nha !!!
\(a,\left(-113\right)+55+113-155=\left(-113+133\right)+\left(55-155\right)=0+\left(-100\right)=-100\\ b,-25.17+17.\left(-75\right)=17\left[\left(-25\right)+\left(-75\right)\right]=17.\left(-100\right)=-1700\)
\(c,6^8:6^6-3\left[\left(-53\right)-\left(-21-53\right)\right]+2022^0\\ =6^2-3\left(-53+21+53\right)+1\\ =36-3.21+1\\ =36-63+1\\ =-26\)
a(-113) + 55 + 113 - 155
=>(-113)+ 113+(55 - 155)
=>-100
b -25.17+17.(-75)
=>17(-25-75)
=>17. (-100)
=>-1700
c 68 : 66-3 [( -53) - ( -21 -53 )] + 20220
=>62- 3[ -53 +21 +53 )]+1
=>36−3.21+1
=>36−63+1
=>−26
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40
= 2. 53 . 9 . 3 + 2. 3 .9 .87 - 3 .2 .9 .40
= 54.53+54.87-54.40
=54(53+87-40)
=54. 100=5400
12 . 25 + 29 . 25 + 59 . 25
= 25 . ( 12+29+59)
=25 . 90
=2250
43 . 37 + 93 . 43 + 57 . 61 + 69 . 57
= 43.(37+93)+57(61+69)
=43.130+57.130
=130.(43+57)
=130.100
=13 000
12 . 53 + 53 . 172 - 53
=53(12+172-1)
=53.184
=9752
35 . 54 + 35 . 58 + 65 . 75 + 65 . 45
=35(54+58)+65(75+45)
=35.112+65.120
=3920+7800
=11720
39 . 8 + 70 . 3 + 31 . 8
=8(39+31)+70.3
=8.70+70.3
=70.(8+3)
=70.11
=770
125: (2\(x\) - 3\(x\)) = 55: 53
125: (-\(x\)) = 25
\(x\) = - 125 : 25
\(x\) = - 5
\(53\cdot125+53\cdot75+200\cdot16\\ =53\cdot\left(125+75\right)+200\cdot16\\ =53\cdot200+200\cdot16\\ =200\cdot\left(53+16\right)\\ =200\cdot79\\ =15800\)
53x125+53x75+200x167
= 53x(125+75)+200x167
= 53x200+200x167
= 200x(53+167) = 200x200 = 40 000