Question

Câu 1 (2 điểm). Thực hiện phép tính.

a) $53.25-25.12+75.53$;

b) $260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2$

Answer 1

\(53.25-25.12+75.53\)

\(=53.\left(25+75\right)-12\)

\(=53.100-12\)

\(=5300-12\)

\(=5288\)

Answer 2

1

 

Answer 3

Answer 4

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=500$

b) $260:\left[5+7.\left(72:2-6\right)\right]-3$

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$

 

Answer 5

Answer 6

a,53.25 - 25.12 + 75.53
   =53.(25+75)-25.12
   =53.100-25.12
   =5300-25.12
   =5300-300
   =5000

Answer 7

a) 53.25-25.12+75.5353.25−25.12+75.53

=\left( 53.25+75.53 \right)-25.12=(53.25+75.53)−25.12

=53.\left( 25+75 \right)-25.12=53.(25+75)−25.12

=53.100-300=53.100−300

=5300-300=5300−300

=5000=5000.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

= 260:\left[ 5+7.\left( 72:8-6 \right) \right]-9=260:[5+7.(72:8−6)]−9

= 260:\left[ 5+7 . 3 \right]-9=260:[5+7.3]−9

= 260:26-9=260:26−9

= 10-9=10−9

= 1=1.

Answer 8

a, 53 x 25 - 25 x 12 + 75 X 13

= [ 53 x 25 + 75 x 13]

= 53 x [25 + 75] - 25 x 12

= 53 x 100 - 300

=5300 - 300

= 5000

b, 260: [ 5 + 7 x [72 : 2³ - 6 ]} - 3²

= 260 : [ 5 + 7 x [72 : 8 - 6 ]} -9

= 260 : [ 5 + 7 x 3 ] - 9

= 260 : 26 - 9

= 10 - 9

= 1

Answer 9

a) 53.25 - 25.12 + 75.53

=53 . (25 + 75) - 12

= 53 . 100 - 12

=5300 - 12

=5288

b)260 : [ 5 + 7 .(72 : 2³ - 6)] -3²

=260 : [ 5 +7 .( 72 : 8 - 6)] - 9

=260 : [5 + 7 .(9 - 6)] - 9

=260 : [5 + 7 . 3] - 9

=260 : [5 + 21] - 9

=260 : 25 - 9

=1,4

Answer 10

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

Answer 11

a) 1325 - 300+3975=5000

 

$b)\; =260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

 

= 260:\left[ 5+7.\left( 72:8-6 \right) \right]-9

Answer 12

53.52 - 25.12 + 65.53

= {53.25+75.53} - 25.12

=53. {25+75} - 25.12

=53.100 -300

=5300-300

=5000

Answer 13

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

 

                   

Answer 14

a. 53.25 - 25.12 + 75.53
 = (53.25 + 75.53) - 25.12
 = 53.(25 + 75) - 25.12
 = 53.100 - 25.12
 = 5300 - 300
 = 5000.
b. 260:[5 + 7.(72:2³


- 6)] − 3
²

 = 260:[5 + 7.(72:8 - 6)] - 9
 = 260:[5 + 7.(9 - 6)] - 9
 = 260:[5 + 7.3] - 9
 = 260:[5 + 21] - 9
 = 260:26 - 9
 = 10 - 9
 = 1.


 

Answer 15

a)53.25 - 25.12+75.53               b)260: [5+7. (72 : 2^3 - 6)] - 3^2

=1325 - 300+3975                     =260:[5+7. 3] - 3^2

=1025+3975                              =260:26 - 3^2

=5000                                        =260:26 -9

                                                  =10-9

                                                  =1               

                                                                             

Answer 16

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

Answer 17

a) 53.25-25.12+75.53

=( 53.25+75.53 )-25.12

=53.( 25+75 )-25.12

=53.100-300

=5300-300

=5000

b) 260:[ 5+7.( 72:2^3-6 )]-3^2

= 260:[ 5+7.( 72:8-6 )]-9

= 260:[ 5+7 . 3 ]-9

= 260:26-9$

= 10-9

= 1

Answer 18

a) 53.25 - 25.12 + 75.53 
= (53.25 + 75.53) - 25.12 
= 53.(25+75) - 25.12
= 53.100-300
= 530-300

=500 

b) 260:[5+7.(72:2³ - 6)] - 3²

=260:[5+7.(72:8-6)]-9

=260:[5+7.(72:8-60]-9

=260:26-9

=10-9

=1

Answer 19

a) 53.25 - 25.12 + 75.53
=  53.25 + (-25).12 + 75.53
= [53.(25 + 75)] + [(-25).4].3
=  53 .100 + (-100).3
=      5 300 + (-300)
= 5000

b)260 : [5+7. (72 : 8 - 6)] - 9
= 260 : [5+7. (9 - 6)] - 9
= 260 : (5+7. 3) - 9
= 260 : (5+21) - 9
= 260 : 26 - 9
= 10 - 9
= 1
 

Answer 20

a) $53.25-25.12+75.53$

$=\left( 53.25+75.53 \right)-25.12$

$=53.\left( 25+75 \right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) $260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2$

$= 260:\left[ 5+7.\left( 72:8-6 \right) \right]-9$

$= 260:\left[ 5+7 . 3 \right]-9$

$= 260:26-9$

$= 10-9$

$= 1$.

Answer 21

a) 53.25 - 25.12 + 75.53;

= 53.(25 + 75) - 25.12

= 53.100 - 300

= 5300 - 300

= 5000

Answer 22

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

Answer 23

$a)\; 53.25\; -25.12\; +\; 75.53$

 

$=\; (53.25+75.53)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

=5300-300$=5300-300$

$=5000$

=500

b) 260 : [5 + 7.(72 : 2³ - 6)] - 3²

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

0

Answer 24

a)  53.25 − 25.12 + 75.53

 = ( 53.25 + 75.53 ) − 25.12 

 =53.(25+75)−25.12

 = 53.100 − 300 

 = 5300 − 300

 = 5000

b)

$53.25-25.12+7$

Answer 25

câu 1:thực hiện phép tính

a)5000

b)1

Answer 26

Answer 27

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:2
³−6)]−3²

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

Answer 28

a) $53.25-25.12+75.53$

$=\left(53.25+75.53\right)-25.12$

$=53.\left(25+75\right)-25.12$

$=53.100-300$

$=5300-300$

$=5000$.

b) 260:\left[ 5+7.\left( 72:2^3-6 \right) \right]-3^2260:[5+7.(72:23−6)]−32

$=260:\left[5+7.\left(72:8-6\right)\right]-9$

$=260:\left[5+7.3\right]-9$

$=260:26-9$

$=10-9$

$=1$.

Answer 29

Answer 30

a)
= 53 . 25 - 25 . 12 + 25 . 3 
= 25 . (53 - 12 + 3)
= 25 . 44
= 1100

b)
= 260 : [ 5 + 7 . 3 ] - 9
= 260 : 26 - 9
= 10 - 9
= 1
 

53.25-25.12+75.553.25−25.12+