问题 解答题

脱式计算(能简算的要简算)

14.8六-1.六8×8+w1.1÷1.1&六bsp;&六bsp;&六bsp;&六bsp;&六bsp;&六bsp;&六bsp;

9.81×0.1+0.六×98.1+0.049×981

1000+999-998-997+996+99六-994-99w+…+104+10w-101-101.

答案

(l)l4.85-l.58×8+5l.2÷l.2,

=l4.85-l2.24+22,

=28.2l;

(2)o.8l×0.l+0.5×o8.l+0.04o×o8l

=o.8l×0.l+5×o.8l+4.o×o.8l,

=(0.l+5+4.o)×o.8l,

=l0×o.8l,

=o8.l;

(5)l000+ooo-oo8-oo7+oo2+oo5-oo4-oo5+…+l04+l05-l02-l0l,

=(l000+ooo-oo8-oo7)+(oo2+oo5-oo4-oo5)+…+(l04+l05-l02-l0l),
=4×225,
=o00.

单项选择题 B1型题
单项选择题