Question

简便计算：45+55X23 5400除18X6 9000除72 42000除12除7除25除5除4 （91X27X84X

Answer 1

45+55X23

=100-55+55*23

=100+55*(23-1)

=100+1210

=1310

5400除18X6

=300/6

=50

9000除72

=9000/9/8

=1000/8

=125

42000除12除7除25除5除4

=42000/(25*4*12*5*7)

=42000/42000

=1

（91X27X84X76）除（9X7X19X13）

=91/13*27/9*84/7*76/19

=7*3*12*4

=1008