能简算的要简算 0.175÷0.25÷4 (3.2+0.12)÷0.8 1999×25+25 463-(263-98) 102×25

问题描述:

能简算的要简算 0.175÷0.25÷4 (3.2+0.12)÷0.8 1999×25+25 463-(263-98) 102×25

0.175÷0.25÷4 =0.175÷(0.25×4)=0.175÷1=0.175(3.2+0.12)÷0.8 =3.2÷0.8+0.12÷0.8=4+0.15=4.151999×25+25 =(1999+1)×25=2000×25=50000463-(263-98) =463-263+98=200+98=298102×25=(100+2)×25=100×25...