a,  80 - 4 . 5 2 - 3 . 2 3

= 80 – (4.25 – 3.8)

= 80 – 76 = 4

b,  5 6 : 5 4 + 2 3 . 2 2 - 1 2018

=  5 2 + 2 5 - 1

= 25 + 32 – 1 = 56

c, [36.4 – 4. 82 - 7 . 11 2 ]:4 –  2019 0

= (144 – 4. 5 2 ):4 – 1

= (144 – 100):4 – 1

= 11 – 1 = 10

d, 303 – 3.{[655 – (18:2+1). 4 3 +5]}: 10 0

= 303 – 3.(655 – 10.64 + 5):1

= 303 – 10 = 293

a) 80-(4.5²-3.2³)=80-100+24=4

b)[36.4-4.(82-7.11)²]:4-2019⁰

={4.[36-(82-7.11)²]}:4-1

=[36-(82-7.11)²]-1

=11-1=10

c)5⁶:5⁴+2³.2²-1²⁰¹⁸

=5²+2⁵-1

=25+32-1=56

d)303-3.{[655-(18:2+1).4³+55]}:10⁰

=303-3.[(655-9-1).4³+55]:1

=303-3[655-640+5]

=303-3(20)

=303-60=243

\(56:54+23.22-12017\)

\(=56.\dfrac{1}{54}+506-12017\)

\(=\dfrac{28}{27}-11511\)

\(=-11509,96296\)

a) 80- (4.52 - 3.23)

= 80- ( 208 -69 )

=80+139  quy tắc đổi dấu trừ tước dấu ngoặc

= 219

e: Ta có: \(2448:\left[119-\left(23-6\right)\right]\)

\(=2448:\left(119-23+6\right)\)

\(=2448:102=24\)

1: \(23+\left(-13\right)+\left(-50\right)\)

\(=23-13-50\)

=10-50

=-40

2: \(-5+15+\left(-123\right)\)

\(=\left(-5+15\right)-123\)

=10-123

=-113

3: \(5871:\left\{928-\left[\left(-82+247\right)\right]\right\}\cdot5\)

\(=5871-\left\{928+82-247\right\}\cdot5\)

\(=5871-763\cdot5=5871-3815=2056\)

4: \(40-\left(4\cdot5^2-3\cdot2^3\right)\)

\(=40-4\cdot5^2+3\cdot2^3\)

\(=40-4\cdot25+3\cdot8\)

=40-100+24

=64-100

=-36

5: \(6^2\cdot5-7^2+149\)

\(=36\cdot5-49+149\)

\(=180+149-49\)

=180+100

=280

6: \(-210:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]+\left(-2022\right)\)

\(=-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]+\left(-2022\right)\)

\(=-210:\left[16+3\cdot18\right]+\left(-2022\right)\)

\(=-210:70-2022\)

=-3-2022

=-2025

7: \(5\cdot2^3+7^{11}:7^9-2023^0\cdot1^8\)

\(=5\cdot8+7^2-1\)

=40+49-1

=39+49

=88

8: \(400:\left\{5\cdot\left[360-\left(290+2\cdot5^2\right)\right]\right\}\)

\(=400:\left\{5\cdot\left[360-290-2\cdot25\right]\right\}\)

\(=400:\left\{5\cdot20\right\}\)

\(=\dfrac{400}{100}=4\)

9: \(75-\left(3\cdot5^2\right)-4\cdot5^3\)

\(=75-3\cdot25-4\cdot5^3\)

=-4*125

=-500

a) $34-29+(-14)+129-(-114)$

$=34-29-14+129+114$

$=34+(129-29)+(114-14)$

$=34+100+100$

$=234$

b) $27\cdot(-35)+(-27)\cdot64-27$

$=(-27)\cdot35+(-27)\cdot64+(-27)\cdot1$

$=(-27)\cdot(35+64+1)$

$=(-27)\cdot(99+1)$

$=(-27)\cdot100$

$=-2700$

c) $160-(4\cdot5^2-3\cdot2^3)\cdot2-(-12)$

$=160-(4\cdot25-3\cdot8)\cdot2+12$

$=160-(100-24)\cdot2+12$

$=160-76\cdot2+12$

$=160-152+12$

$=160-(152-12)$

$=160-140$

$=20$

a, 34 - 29 + (-14) + 129 - (-114)

= 34 + (129 - 29) + (114  - 14)

= 34 + 100 + 100

= 234

b, 27.(-35) + (-27).64 - 27

= (-27).(35 + 64 + 1)

= - 27 . 100

= - 2700

c, 160 - (4.5² - 3.2³).2 - (-12)

= 160 - (4.25 - 3.8).2 + 12

=  160 - (100 - 24).2 + 12

=  160 - 76.2 + 12

= 160 - 152 + 12

= 8 + 12

= 20 

a, 34-29+(-14)+129-(-114)
= 34-29-14+129+114
= (34-14)+(-29+129)+114
= 20 + 100 + 114
= 234

\(=80-100+24=4\)

=55

\(=80-4.25+3.8=4\)

a) `27 .75 + 25.27 -150`

`=27 xx (75 + 25)-150`

`=27 xx 100-150`

`=2700-150`

`=2550`

b) `142-[50-(2^3 .10-2^3 .5)]`

`=142-[50-2^3 .(10-5)]`

`=142-(50-8 .5)`

`=142-(50-40)`

`=142-10`

`=132`

c) `375:{32-[4+(5.3^2-42)]}-14`

`=375:{32-[4+(45-42)]}-14`

`=375:[32-(4+3)]-14`

`=375: 25 -14`

`=15-14`

`=1`

a. 27 . 75 + 25 . 27 - 150

= 27. (75 + 25) - 150

= 27 . 100 - 150

= 2700 - 150

= 2550

b. 142 - [50 - (2³.10 - 2³.5)]

= 142 - [50 - (8 . 10 - 8 . 5)]

= 142 - {50 - [8 . (10 - 5)]} 

= 142 - (50 - 40)

= 142 - 10

= 132

c. 375 : {32 – [ 4 + (5. 3² – 42)]} – 14

= 375 : {32 – [ 4 + (5. 9 – 42)]} – 14

= 375 : {32 – [ 4 + (45 – 42)]} – 14

= 375 : {32 – [ 4 + 3]} – 14

= 375 : {32 –7} – 14

= 375 : 25 - 14

= 15 - 14

= 1

80 + ( 4,52 - 3,24 )= 80 + 1,28 = 81,28

80 + ( 4.52 - 3.24) = 81.28 

80 + ( 4.52 - 3.24)

80 + ( 208 - 72 )

80 + 136 

= 216 

MK làm đúng thì k  nha