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a: \(-59+71-\left\{-83-\left(95\right)\right\}\)
\(=71-59+81+95\)
\(=12+81+95\)
\(=93+95=188\)
b: \(-257-\left\{\left(-257+156\right)-56\right\}\)
\(=-257-\left(-257+156-56\right)\)
\(=-257-\left(-257+100\right)\)
\(=-257+257-100=-100\)
c: Sửa đề:\(\left(435-167\right)-89-\left(435-89\right)\)
\(=435-167-89-435+89\)
=\(\left(435-435\right)+\left(-89+89\right)-167\)
=0+0-167
=-167
d: \(-329+\left(15-101\right)-\left(25-440\right)\)
\(=-329+15-101-25+440\)
\(=\left(440-329-101\right)+\left(15-25\right)\)
=10-10
=0
e: \(\left(116+124\right)+\left(215-116-124\right)\)
\(=116+124+215-116-124\)
\(=\left(116-116\right)+\left(124-124\right)+215\)
=0+0+215
=215
f: \(4524-\left(864-999\right)-\left(36-999\right)\)
\(=4524-864+999-36+999\)
\(=4524-\left(864+36\right)+999\cdot2\)
\(=4524-900+1998=5622\)
152 - 148 + 144 - 140 + 136 - 132 + 128 - 124 + 120 - 116 + 112 - 108 + 104 - 100=
= ( 152 -132 ) - ( 148 - 128 ) + ( 144 - 124 ) - ( 140 - 120 ) + ( 136 - 116 ) - ( 132 - 112 ) - ( 124 - 104 )
= 20 - 20 + 20 - 20 + 20 - 20 - 20
= -20
HOk tốt!!!!!!!!
a/ x-7=-5
x=-5+7
x=2
câu này ai ko làm được ko phải người ^-^
d) ( x : 3 - 4 ) . 5 = 15
=> x : 3 - 4 = 15 : 5 = 3
=> x : 3 = 3 + 4 = 7
=> x = 7 . 3 = 21
35.6^3 = 7.5.6^3
7^5 = 7.7.7^3
7.5.6^3 < 7.7.7^3
Vậy 35.6^3 < 7^5
1. 324 + [ 112 - ( 112 + 324 ) ]
= 324 + ( 112 - 436)
= 324 + ( - 324 )
= 0
2. ( - 59 + 71 ) - ( - 83 - 59 )
= 12 - ( - 412 )
= 424
3. - 257 - [ ( - 257 + 156 ) - 56 ]
= - 257 - ( - 101 - 56 )
= - 257 - ( - 157 )
= - 100
`324 + [ 112 - ( 112 + 324 ) ]`
`= 324 + ( 112 - 436)`
`= 324 + ( - 324 )`
`=324-324`
`=0`
________________________________
` - 257 - [ ( - 257 + 156 ) - 56 ]`
`= - 257 - ( - 101 - 56 )`
`= - 257 - ( - 157 )`
`-257 + 157`
`= - 100`
_________________________
`-329 + (15-101)-(25-440)`
`=-329 + 15 - 101 - 25 + 440`
`=(-329 - 101) + (15-25)+440`
`=-430 + (-10)+440`
`=-430 - 10+440`
`=-440 +440`
`=0`
_____________________________________
`4524-(864 - 999) - (36 + 999)`
`=4524 - 864 + 999 - 36 - 999`
`=(4524 - 864 )+(999-999)-36`
`=3660 + 9 -36`
`=3624`