Question

用简便方法计算67X53-63ⅹ43

Answer 1

67×53-63×43
=67×10+67×43-63×43
=670+（67-63）×43
=670+172
=842
或：
67×53-63×43
=4×53+63×53-63×43
=212+63×（53-43）
=212+630
=842

Answer 2

=(63+4)×53-63×43
=63×53+63×4-63×43
=63×(53-43)+63x4
=63×10+252
=630+252
=882

Answer 3

67X53-63ⅹ43
=67×（43+10）-63×43
=67×43+67×10-63×43
=43×（67-63）+6700
=43×4+6700
=172+6700
=6872

追答

修正:172+670=842

Answer 4

67×53-63×43
＝63×（53-43）
＝63×10
＝630

追答

看错了，改

Answer 5

请理解以上解答