Question

37×62+39×39-37简便计算？

Answer 1

=37*（62-1）+39*39
=37*61+39*39
=（39-2）*61+39*39
=39*61-2*61+39*39
=39*（61+39）-2*61
=3900-122
=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

37×62+37×39-37
=37×(62+39-1)
=37×100
=3700

Answer 4

=37×（62－1）+39×39
=37×61+39×39
=37×61+（37+2）×39
=37×61+37×39+39×2
=37×（61+39）+78
=37×100+78
=3778

Answer 5

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