3.6×7.3+2.7 的简便运算
=(4-0.4)x7.3+2.7
=29.2-2.92+2.7
=28.98
3.6×7.3+2.7=0.9（4×7.3+3）=0.9（29.2+3）=0.9×32.2=28.98
3.6×7.3+2.7的简便运算=2.6x7.3+(7.3+2.7)=18.98+10=28.98
3.6×7.3+2.7x3.6=3..6x（7.3+2.7）=3.6x10=36
