分析:(1)先算乘法,再算除法,最后算加法;
(2)先把32分解成4×8,再運(yùn)用乘法結(jié)合律簡(jiǎn)算;
(3)先算小括號(hào)里面的除法,再算小括號(hào)里面的加法,最后算括號(hào)外的乘法;
(4)根據(jù)加法結(jié)合律簡(jiǎn)算;
(5)先算小括號(hào)里面的除法,再算小括號(hào)里面的加法,最后算括號(hào)外的減法;
(6)先算小括號(hào)里面的加法,再算中括號(hào)里面的減法,最后算括號(hào)外的除法.
解答:解:(1)24+16×11÷8,
=24+176÷8,
=24+22,
=46;
(2)1.25×32×2.5,
=1.25×4×8×2.5,
=(1.25×8)×(2.5×4),
=10×10,
=100;
(3)(2.8+3.85÷3.5)×0.2,
=(2.8+1.1)×0.2,
=3.9×0.2,
=0.78;
(4)
+
-
+
,
=(
-
)+(
+
),
=
+1,
=1
;
(5)10.9-(
+9.6÷4),
=10.9-(
+2.4),
=10.9-2.8,
=8.1;
(6)
÷[1-(+)],
=
÷[1-
],
=
÷
,
=5.
點(diǎn)評(píng):本題考查了四則混合運(yùn)算,注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算定律進(jìn)行簡(jiǎn)便計(jì)算.