Question

72+73+68+69+70+71+66+67+74的简便计算？

Answer 1

72+73+68+69+70+71+66+67+74
＝70+（71+69）+（72+68）+（73+61）+（74+66）
＝70+140×4
＝70+560
＝630

Answer 2

72+73+68+69+70+71+66+67+74的简便计算？
72+73+68+69+70+71+66+67+74
=70x9+2+3-2-1+0+1-4-3+4
=630

Answer 3

72+73+68+69+70+71+66+67+74
=(72+68)+(73+67)+(69+71)+(66+74)+70
=140+140+140+140+70
=630

Answer 4

72＋73＋68＋69＋70＋71＋66＋67＋74
＝（72＋68）＋（73＋67）＋（69＋71）＋（66＋74）＋70
＝140＋140＋140＋140＋70
＝140×4＋70
＝560＋70
＝630

Answer 5

72+73+68+69+70+71+66+67+74
=(72+68)+(73+67)+(69+71)+(66+74)+70
=140+140+140+140+70
=70×9
=630