Question

37×62+39×39-37简便计算？

Answer 1

原式=37×(62-1)+39×39=37×61+39×39=(39-2)×61+39×39=39×(61+39)-2×61=39×100-122=3900-122=3778

Answer 2

37×62+39×39-37
=37×（62-1）+39×（40-1）
=37×61+39×40-39×1
=37×（60+1）+1560-39
=37×60+37+1560-39
=2220+37+1560-39
=2220+1560-2
=3780-2
=3778

Answer 3

37×62-37+39×39
=37×(62-1)+(40-1)×(40-1)
=37×61+40×40-40-40+1
=37×(60+1)+1600-80+1
=37×60+37+1600-80+1
=2220+37+1600-80+1
=2220+1600-80+37+1
=3820-80+38
=3740+38
=3778

Answer 4

37×62+39×39-37
＝37×62+(37+2)×39-37
＝37×(62+39-1)-2×39
＝37×100-78
＝3700-78
＝3622

Answer 5

解原式=37×（62-1）+39×39
=37×61+39×（37+2）
=37×（61+39）+39×2
=3700+78
=3778