直接写出下列各题的结果 8[4/5]+5.25+1.2+2[3/4]= 4[11/12]+49[11/12]+499[1
1个回答

(1)8[4/5]+5.25+1.2+2[3/4],

=8.8+5.25+1.2+2.75,

=(8.8+1.2)+(5.25+2.75),

=10+8,

=18;

(2)4[11/12]+49[11/12]+499[11/12]+4999[11/12]+[1/3],

=4+[11/12]+49+[11/12]+499+[11/12]+4999+[11/12]+[4/12],

=(4+49+499+4999)+[11/12]×4+[4/12],

=(4+50-1+500-1+5000-1)+([11/12]×4+[4/12]),

=5551+4,

=5555;

(3)100÷[1/4]×4-100,

=100×4×4-100,

=1600-100,

=1500;

(4)11+192+1993+19994+199995,

=(10+1)+(200-8)+(2000-7)+(20000-6)+(200000-5),

=222210-(8+7+6+5-1),

=222210-25,

=222185;

(5)100-98+96-94+92-90+…+76-74+72,

=(100-98)+(96-94)+(92-90)+…+(76-74)+72,

=2+2+2+2+2+2+2+72,

=14+72,

=86.