Question

0.78×98简便计算

Answer 1

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

Answer 2

0.78*（100-2

追答

）

Answer 3

＝ 0.78+（100-2）

追答

＝0.78×100-0.78×2

＝78-1.56

＝16.44

Answer 4

0.78×98
=0.78×(100-2)
=0.78×100-0.78×2
76.44

Answer 5

0.78x98 =0.78x(100-2)
=0.78x100-0.78x2
=78-1.56
=76.44