分析:(1)先算乘法,再算減法;
(2)先去掉小括號(hào),然后再按照從左到右的順序計(jì)算,注意去括號(hào)時(shí)要注意改變運(yùn)算的順序;
(3)先把101分解成100+1,再運(yùn)用乘法分配律簡(jiǎn)算;
(4)運(yùn)用乘法交換律簡(jiǎn)算;
(5)先把除法變成乘法,再運(yùn)用乘法結(jié)合律簡(jiǎn)算;
(6)102=10×10,由此求解;
(7)先算除法,再算加法;
(8)先把百分?jǐn)?shù)化成小數(shù)再計(jì)算;
(9)先算乘法,再算加法;
(10)運(yùn)用加法交換律簡(jiǎn)算.
解答:解:
(1)1-2×50%=0,
(2)15.4-(5.4-4.5)=14.5,
(3)41×101=4141,
(4)1.25×10×8=100,
(5)
×5÷
×5=25,
(6)10
2=100,
(7)3+1÷
=6,
(8)8×12.5%=1,
(9)
+
×0=
,
(10)0.68+
+0.32=1
.
點(diǎn)評(píng):本題考查了基本的運(yùn)算,要注意分析數(shù)據(jù),選擇合適的簡(jiǎn)算方法計(jì)算.