Question

七点5乘0点4×25乘一点八简便计算

七点5乘0点4×25乘一点八简便计算

Answer 1

=7.5×(0.4×25)×1.8
=7.5×(10×1.8)
=7.5×18
=7.5×20-7.5×2
=150-15
=135

Answer 2

7.5*0.4*25*1.8
=7.5*(0.4*25)*1.8
=7.5*10*2*0.9
=75*2*0.9
=150*0.9
=135

Answer 3

7.5X0.4X25X1.8
=7.5X1.8X(0.4X25)
=7.5X2X0.9X10
=15X9
=135

Answer 4

7.5×0.4×25×1.8

=7.5×（0.4×25）×1.8
=7.5×（10×1.8）
=7.5×18
=7×18+0.5×18
=126+9
=135

Answer 5

7.5X0.4X25X1.8
=7.5X(0.4X25)X1.8
=7.5X10X1.8
=75X1.8
=75X2X0.9
=150X0.9
=135