:7.6X2.7+7.2X(11-3.4)
1个回答

=7.6*2.7+7.2*7.6

=7.6*(2.7+7.2)

=7.6*9.9

=7.6*(10-0.1) 或者直接=75.24

=7.6*10-7.6*0.1

=76- 0.76

=75.24