Question

256x42-42x56简便方法？

Answer 1

256×42-42×56
=（256-56）×42
=200×42
=8400
两个数的差乘一个数，可以用括号里的两个数分别乘这个数，再把积相减。(a-b)×c=a×c-b×c

Answer 2

256x42-42x56简便方法为
256x42-42x56
= （256-56）x42
= 200x42
= 8400

Answer 3

256x42-42x56
=（256-56）x42
=200x42
=8400

Answer 4

256×42－42×56
=(256－56)×42
=200×42
=8400

Answer 5

256×42－42×56
＝（256－56）×42
＝200×42
＝8400