0.76*23+7.6*2.2+5.5*7.6 654321的平方-654322*654320 128*132

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0.76*23+7.6*2.2+5.5*7.6654321的平方-654322*654320128*1320.76*23+7.6*2.2+5.5*7.6654321的平方-654322*6543201

0.76*23+7.6*2.2+5.5*7.6 654321的平方-654322*654320 128*132
0.76*23+7.6*2.2+5.5*7.6 654321的平方-654322*654320 128*132

0.76*23+7.6*2.2+5.5*7.6 654321的平方-654322*654320 128*132
0.76×23+7.6×2.2+5.5×7.6
=0.76×23+0.76×22+55×0.76……变一变,就简便.
=0.76×(23+22+55)
=0.76×100
=76
654321²-654322×654320
=654321²-(654321+1)×654320
=654321²-654321×654320-654320
=654321×(654321-654320)-654320
=654321-654320
=1
128×132
=128×(100+30+2)
=128×100+128×30+128×2
=12800+3840+256
=16896