9.9×6.6+3.3×10.2
=(10-0.1)×6.6+3.3×(10+0.2)
=66-0.66+33+6.6
99
9.9╳6.6+3.3x10.2=3.3x3x6.6+3.3x10.2=3.3x(3x6.6+10.2)=3.3x30=99
原式=6.6(9.9+10.2/2)
=6.6(9.9+5.1)
=6.6x15
=6.6x10+6.6x5
=6.6x10+3.3x10
=66+33
=99
9.9×6.6+3.3x10.2怎么简便计算?
=65.34+3.3*10.2
=33.66+65.34
=99