Question

6.8×55+5.5×37.2 简便计算！

Answer 1

＝6.8×55＋55×37.2÷10
＝55×（6.8＋37.2）÷10
＝55÷10×43
＝5.5×43
＝236.5

Answer 2

6.8*5.5+5.5*3.72
=5.5*(6.8+3.72)
=5.5*10.52
=57.86

Answer 3