Question

37×62+39×39-37简便计算？

Answer 1

37×62＋39×39-37
＝37×（62-1）+39×39
＝37×61+39×39
＝37×（60+1）+39×39
＝37×60+37+（40-1）×（40-1）
＝2220+37+40×40-40-40＋1
＝2220+37+1600-80+1
＝2220+37+1+1600-80
＝2257+1+1600-80
＝2258+1600-80
＝3858-80
＝3778

Answer 2

37*62+39*39-37
=37*（62-1）+（37+2）*39
=37*（62-1+39）+2*39
=37*100+2*39
=3700+78
=3778

Answer 3

37Ⅹ62+39x39-37
=37x62+（37+2）X39-37
=37x62+37x39+2x39-37X1
=37X（62+39-1）+2X39
=37X100+78
=3778

Answer 4

37×62+39×39-37
=37×62+39×（37+2）-37
=37×（62+39-1）+39×2
＝37×100+78
＝3778

Answer 5

37*62+39*39-37
=37*62+（37+2）*39-37
=37*62+37*39-37+2*39
=37*62+37*（39-1）+78
=37*（62+38）+78
=3700+78
=3778