Question

83×23.9－83×3.9的简便计算？

Answer 1

83×23.9-83×3.9
=83x(23.9—3.9)
=83×20
=1660

Answer 2

83X（20十3.9）83X3.9

Answer 3

83×23.9-83×3.9=83×（23.9-3.9）=83×20=1660

Answer 4

83×23.9-83×3.9
=83×(23.9-3.9)
＝83×20
＝1660

Answer 5

83×23.9－83×3.9=83×（23.9-3.9）=83×20=1660