Question

(1).(25十2.5+0.25)x4(2).0.25X10.56一0.25X6.56(3).5.3X9.9简便计算

Answer 1

(1).(25十2.5+0.25)x4

=25*4+2.5*4+0.25*4

=100+10+1

=111

(2).0.25X10.56一0.25X6.56

=0.25*(10.56-6.56)

=0.25*4

=1

(3).5.3*9.9

=5.3*(10-0.1)

=5.3*10-5.3*0.1

=53-0.53

=52.47