Question

0.78X98用简便计算怎么算

Answer 1

（100-2）×0.78 =100×0.78-2×0.78 =78-1.56 =76.44

Answer 2

 

Answer 3

0.78*(100-2)

Answer 4

0.78×（100－2）＝78－1.56＝76.44

Answer 5

0.78x(100-2)

追答

0.78x100-0.78x2

连起来