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a) 23 . 17 - 23 . 14
= 23(17-14)
=23. 3= 24
b) 80 - ( 4 . 5 - 3 . 23 )
= 80- 22. (5-3.2)= 80- 22.(-1)
= 80- 4.(-1)= 80- (-4)= 84
c) 35 - { 12 - [ -14 + ( -2) }
= 35 - { 12 - (-16) }
=35- 28= 7
d) 49 - ( -45) - 23
= 94-23= 71
e) 13 - 18 - ( -42) - 15
= -5 -(-42) -15
= -20+42= 22
g) -452 - ( -67 + 75 - 452 )
= -452- (8-452)
= -452 -(- 444)= -8
h) |31−17|−|13−52|
= 14- 39= -25
80 -(4.52 -3.23)
= 80- (4.25- 3.8)
= 80- (100-24)
= 80-76= 4
1) \(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=-\left(452-67\right)-75+452\)
\(=-385-75+452\)
\(=-\left(385+75\right)+452\)
\(=-460+452\)
\(=-\left(460-452\right)\)
\(=-8\)
b) \(35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\)
\(=35-\left[12-\left(-14-2\right)\right]\)
\(=35-\left\{12-\left[-\left(14+2\right)\right]\right\}\)
\(=35-\left[12-\left(-16\right)\right]\)
\(=35-\left(12+16\right)\)
\(=35-28\)
\(=7\)
c) \(-\left|-5\right|+\left(-19\right)+18+\left|11-4\right|-57\)
\(=-5-19+18+\left|7\right|-57\)
\(=-5-19+18+7-57\)
\(=-\left(5+19\right)+18+7-57\)
\(=-24+18+7-57\)
\(=-\left(24-18\right)+7-57\)
\(=-6+7-57\)
\(=-\left(6-7\right)-57\)
\(=-\left(-1\right)-57\)
\(=1-57\)
\(=-57+1\)
\(=-\left(57-1\right)\)
\(=-56\)
Mình đặt tên a,b,c cho 3 ý cho dễ gọi nha.
a,\(-452-\left(-67+75-452\right)\)
\(=-452+67-75+452\)
\(=-8\)
b,\(35-\left\{12-\left[-14+\left(-2\right)\right]\right\}\)
\(=35-\left(12+14-2\right)\)
\(=35-24\)
\(=11\)
c,\(-\left|-5\right|+\left(-19\right)+18+\left|11-4\right|-57\)
\(=-5-19+18+7-57\)
\(=-56\)
1: =29-16-3*2=13-6=7
2: =35-12+(-14)-2
=23-16=7
3: =4*3125-32:16
=12500-2
=12498
4: =-452+67-75+452=-8
5: =18+99*18-3^5-2^5
=1800-275
=1525
d: =-452+67-75+452=-8
e: \(=1997-\left[10\cdot8:8+8\right]=1997-11=1986\)
bấm máy tính đi
a) 96
b) 69
c)96
d)96
e)69