Question

42×199+43简便计算？

Answer 1

42×199+43的简便计算是:
42×（200-1）+43
=8400-42+43
=8400+（43-42）=8401

Answer 2

42＊199家42家1
42＊199家42＊1家1
42成括号里199家1家1
42成200家1

Answer 3

先乘后加法答案是8401

Answer 4

42×199+43
=42×199+42+1
=42×199+42×1+1
=42×(199+1)+1
=42×200+1
=8400+1
=8401

Answer 5

42x(199+1)+1=4201