解:(1)(+7)+(-8)-(+3)-(-4)
=7-8-3+4
=11-11
=0;
(2)-1
-2
÷(-
)×(-3)
=-1
-
×(-
)×(-3)
=-1
-4
=-6;
(3)-36×(
-
-
)
=(-36)×
+(-36)×(-
)+(-36)×(-
)
=-4+6+2
=-4+8
=4;
(4)-1
3-(1-0.5)×
×[2-(-3)
2]
=-1-
×
×(2-9)
=-1+
=
;
(5)(-0.25)×1.25×(-4)×(-8)
=(-0.25)×(-4)×[1.25×(-8)]
=1×(-10)
=-10;
(6)(-1)
10×2+(-2)
3÷4
=1×2+(-8)÷4
=2-2
=0.
分析:(1)先化簡(jiǎn),再根據(jù)有理數(shù)的加減混合運(yùn)算法則計(jì)算求解;
(2)根據(jù)有理數(shù)的混合運(yùn)算的順序,先算乘除再算加減;
(3)利用乘法分配律簡(jiǎn)便運(yùn)算;
(4)根據(jù)有理數(shù)混合運(yùn)算的順序,先算乘方再算乘除最后算加減,有括號(hào)的先算括號(hào)里面的;
(5)利用乘法交換結(jié)合律簡(jiǎn)便運(yùn)算;
(6)先算乘方再算乘除最后算加減.
點(diǎn)評(píng):本題信息量比較大,主要考查有理數(shù)的混合運(yùn)算和利用運(yùn)算定律簡(jiǎn)便運(yùn)算,這就要求同學(xué)們?cè)谄綍r(shí)的學(xué)習(xí)中多下功夫.