直接写出以下问题的结果:845+5.25+1.2+234 = 4112+491112+499165438。

=8.8+5.25+1.2+2.75,

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

=10+8,

=18;

(2)41112+491112+4991112+49991112+13,

=4+1112+49+1112+499+1112+4999+1112+412,

=(4+49+499+4999)+1112×4+412,

=(4+50-1+500-1+5000-1)+(1112×4+412),

=5551+4,

=5555;

(3)100÷14×4-100,

=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.