分析:(1)(10)注意小數(shù)點(diǎn)對(duì)齊;(2)(3)把除法改為乘法,再計(jì)算;(4)運(yùn)用乘法分配律簡(jiǎn)算;(5)把分?jǐn)?shù)化為小數(shù),再計(jì)算;(6)(12)先算180×3,6×25,然后在結(jié)果中從后向前數(shù)出兩位,點(diǎn)上小數(shù)點(diǎn);(7)把分?jǐn)?shù)化為小數(shù),再計(jì)算;(8)把除法改為乘法,約分即可;(9)0乘任何數(shù)都得0;(11)先算38×2,然后在結(jié)果中從后向前數(shù)出一位,點(diǎn)上小數(shù)點(diǎn).
解答:解:0.36+1.64=2; 8÷
×2=64;
÷2=
; 3.4×9+3.4=34;
0.45+
+0.54=1.24; 180×0.03=5.4; 5-
=4.8;
×5÷
×5=25;
÷
×0=0; 3-1.73=1.27; 3.8×2=7.6; 0.6×2.5=1.5.
點(diǎn)評(píng):此題考查了小數(shù)點(diǎn)對(duì)齊、乘除法的轉(zhuǎn)化、運(yùn)算定律、0的特殊作用.