要简便运算啊!也要梯等式..我没有要你们只做两个,我只是打两个梯等式的等号举例子而已..
问题描述：
要简便运算啊!也要梯等式..我没有要你们只做两个,我只是打两个梯等式的等号举例子而已..
37.2*5.4+3.28*54
=
=
0.8888*0.8+0.1111*1.6
=
=
9.99*7.78+3.33*6.66
=
=
答
加分啊37.2*5.4+3.28*54 = 37.2*5.4+32.8*5.4 =(37.2+32.8)*5.4 = 70*5.4 =378 0.8888*0.8+0.1111*1.6 = 0.1111*8*0.8+0.1111*1.6 = 0.1111*(6.4+1.6) =0.8888 9.99*7.78+3.33*6.66 = 9.99*7.78+9.99*2.22 =9.99*(7....