Question

37×62+39×39-37简便计算？

Answer 1

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

Answer 2

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

Answer 3

37×62+39×39—37
=37×（62—1）+（37+2）×39
=37×61+37×39+2×39
=37×（61+39）+78
=37×100+78
=3700+78
=3778

Answer 4

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