Question

4*187+15.4*384+3.3*16简便计算

Answer 1

4 X 187 + 15.4 X 384 + 3.3 X 16

= (4 X 17 X 11) + (384 X 1.4 X 11) + (3 X 1.1 X 4 X 4)

= (11 X 4 X 17) + (11 X 4 X 96 X 1.4) + (11 X 4 X 1.2)

= (4.4 X 170) + (4.4 X 32 X 42) + (4.4 X 12)

= 4.4 X ( 170 + 64 X 21 + 12 )

= 4.4 X ( 182 + 1280 + 64 )

= 4.4 X ( 246 + 1280 )

= 4.4 X 1526

= 1.1 X 6104

= 6714.4