122+124+126+128+130+132+134简算

问题描述:

122+124+126+128+130+132+134简算

896

(122+134)+(124+132)+(126+130)+128=128*7=896

=(122+134)+(124+132)+(126+130)+128
=3*256+128
=6*128+128
=7*128
=896