Question

Tính nhanh

a) 345 - ( 345 + 77 ) - ( 77 +  23 )

b) 234 + ( 433 - 234 )

 

Answer 1

a) 345 - ( 345 + 77 ) - ( 77 +  23 )

= 345 - 345 - 77  -  77 -  23 

= (345-345) - (77+23) - 77

= 0 - 100 - 77

= -100 - 77

= -177

b) 234 + ( 433 - 234 )

= 234 + 433 - 234

= (234-234) + 433

= 0 + 433

= 433

Answer 2

a) 345 - ( 345 + 77 ) - ( 77 +  23 )

= 345 - 345 - 77 - 77 + 23 = -77 - 77 + 23

= -77.2 + 23

= -154 + 23

= -131

b) 234 + (433 - 234) 

= 234 + 433 - 234

= (234 - 234) + 433

= 0 + 433

= 433

Answer 3

a, 345 - ( 345 + 77 ) - ( 77 + 23 )

= 345 - 345 - 77 - 77 - 23

= - 23

b, 234 + ( 433 - 234 )

= 234 + 433 - 234

= ( 234 - 234 ) + 433

= 433

Answer 4

a)23

b)433

Answer 5

a) \(345-\left(345+77\right)-\left(77+23\right)\)

\(=345-345-77-77-23\)

\(=-177\)

b) \(234+\left(433-234\right)\)

\(=234+433-234\)

\(=433\)

Answer 6

a) 345 - ( 345 + 77 ) - ( 77 + 23 )

 = 345 - 345 - 77 - 77 - 23

 = ( 345 - 345 ) - ( 77 + 23 ) - 77

 = 0 - 100 - 77

 = -100 - 77

 = -177

b) 234 + ( 433 - 234 )

 = 234 + 433 - 234

 = ( 234 - 234 ) + 433

 = 0 + 433

 = 433

Answer 7

a)

345 - (345 + 77) - (77 + 23)

= 345 - 345 - 77 - 77 - 23

= (345 - 345) - (77 + 23) - 77

= 0 - 100 - 77

= -100 - 77

= -177

b)

234 + (433 - 234)

= 234 + 433 - 234

= (234 - 234) + 433

= 0 + 433

= 433

Answer 8

Tính nhanh

a) 345 - ( 345 + 77 ) - ( 77 +  23 )

b) 234 + ( 433 - 234 )

Đáp án:

a,=-177

b,=433

Đúng 100%

Answer 9

a,345-(345+77)-(77+23)

=> 345-345-77-77-23(Do phá ngoặc đổi dấu)

=(345-345)-(77+23)-77

=0-100-77

= -177

b, 234+(433-234)

=> 234+433-234

=(234-234)+433

=0+433

=433