Question

78+75+76+64+76+70+68+62简便运算怎么列式？

Answer 1

＝（76+64）+（68+62）+78+75+76+70
＝140+（130+70）+（78+75+76）
＝140+200+229
569

Answer 2

78+75+76+64+76+70+68+62
=（78+62）+（76+64）+70+（70-2）+75+(75+1）
=140+140+140-2+150+1
=140＊3+150-1
=420+150-1
=570-1
=569

Answer 3

首位的和：7X5+6X3=35+18=53，末位的和：8+5+6+6+4+8+2=39，式子的和=530+39=569。

Answer 4

78+75+76+64+76+70+68+62
=80×4+70×4-2-5-4-4-6-2-8
=(80+70)×4-(2+8+4+6+2+5+4)
=150×4-31
=600-31
=569

Answer 5

78+75+76+64+76+70+68+62
=70+8+70+5+70+6+70-6+70+6+70+70-2+70-8
=(70+70+70+70+70+70+70+70)+(8+5+6-6+6-2-8)
=560+9
=569。