\(a,67654-40448:79=67654-512=67142\\ b,15678:67+46\times98=234+4508=4742\)

a 67142

b 4742

a) 67654-40448:79

=67654-512

=67142

b) 15678:67 + 46✖98

=234+4508

=4742

a) 57 + 28 = 85

24 + 67 = 91

46 + 39 = 85

b) 83 - 19 = 64

42 - 38 = 4

90 - 76 = 14

\(\begin{array}{*{20}{c}}{a)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{57}\\{28}\end{array}}\\\hline{\,\,\,\,85}\end{array}\)                            \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{24}\\{67}\end{array}}\\\hline{\,\,\,\,91}\end{array}\)                            \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{46}\\{39}\end{array}}\\\hline{\,\,\,\,85}\end{array}\)

\(\begin{array}{*{20}{c}}{b)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{83}\\{19}\end{array}}\\\hline{\,\,\,\,64}\end{array}\)                           \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{42}\\{38}\end{array}}\\\hline{\,\,\,\,04}\end{array}\)                            \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{90}\\{76}\end{array}}\\\hline{\,\,\,\,14}\end{array}\)

=585

k mk vs. Chúc bạn học thật giỏi

90 + 67 + 54 + 23 + 87 + 98 + 14 + 78 + 46 + 28 

= 585

Chúc bạn hk tốt ~

585 bạn nha

chúc bạn học tốt~

Tham khảo:

\(\begin{array}{*{20}{c}}{a)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{536}\\{\,\,\,\,\,8}\end{array}}\\\hline{\,\,\,544}\end{array}\)                           \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{\,\,\,67}\\{829}\end{array}}\\\hline{\,\,\,\,996}\end{array}\)                            \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{432}\\{284}\end{array}}\\\hline{\,\,\,\,716}\end{array}\)

\(\begin{array}{*{20}{c}}{b)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{253}\\{\,\,\,\,\,7}\end{array}}\\\hline{\,\,\,\,246}\end{array}\)                     \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{561}\\{\,\,\,42}\end{array}}\\\hline{\,\,\,519}\end{array}\)                             \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{795}\\{638}\end{array}}\\\hline{\,\,\,\,057}\end{array}\)

máy tính đâu bạn

a = -200

b= -993

c= -527

d= 2012

a.-200

b.-993

c-527

d. 2012

  33.98+67.42+67.34+67.22

=33.98+67.(42+34+22)

=33.98+67.98

=(33+67).98

=100.98

=9800

ds=9800

tik nhaaaaaaaaa

Ta có: 
33 x 98 + 67 x 42 + 67 x 34 + 67 x 22
= 33 x 98 + 67(42 + 34 + 22)
= 33 x 98 + 67 x 98
= (33 + 67) 98
= 100 x 98
= 9800

giải giúp mình với 

17464 - 17464 : 74 - 74 x 158

= 158 x ( 17464 - 17464 ) : ( 74 - 74 )

= 158 x 0 : 0

= 0 x 0

= 0

a) (15678 + 5938) x 4 = 21616 x 4    b) 9347 – 25636 : 4 = 9347 – 6409

   = 86464    = 2938

c) 21156 : 3 x 4 = 7052 x 4     d) 2450 : (825 – 820) = 2450 : 5

    = 28208    = 490