99乘以102减1484怎样简便运算(
99乘以102减1484,怎样简便运算? -
99*102-1484 =(100-1)(100+2)1484 =100*100+100-2-1484 =101*100-1486 =101*100-15*100+14 =86*100+14 =8614
99*102-1484=(100-1)(100+2)-1484=100*100+100-2-1484=101*100-1486=101*100-15*100+14=86*100+14=8614
99*102-1484 =(100-1)(100+2)1484 =100*100+100-2-1484 =101*100-1486 =101*100-15*100+14 =86*100+14 =8614
99*102-1484=(100-1)(100+2)-1484=100*100+100-2-1484=101*100-1486=101*100-15*100+14=86*100+14=8614