分析:0×103根據(jù)0乘任何數(shù)都得0求解;0.3
3=0.3×0.3×0.3,由此求解;
+
+2按照從左到右的順序計算;
×
÷
×
先把除法變成乘法,然后運用乘法結(jié)合律簡算;1.3×0.8×12.5運用乘法結(jié)合律簡算;其它題目根據(jù)運算法則直接求解.
解答:
解:+=1, |
×6=, |
270÷1=270, |
2÷=10, |
5-0.25=4.75, |
4.5×100=450, |
2.4+1.6=4, |
7÷0.25=28, |
0×103=0, |
18+15=33, |
12.56÷3.14=4, |
130×7=910, |
1.2÷2%=60, |
0.75×8=6, |
0.33=0.027, |
×45=35, |
3.14×7=21.98, |
3.14×0.8=2.512, |
×=, |
64÷0.4=160, |
+=, |
-=, |
1.4÷0.2=7, |
0.9-=0.3, |
+=, |
0.32+3.2=3.52, |
++2=2, |
2.4×5=12, |
×÷×=, |
1.3×0.8×12.5=13. |
點評:本題考查了基本的計算,計算時要細(xì)心,注意小數(shù)點的位置以及把結(jié)果化成最簡分?jǐn)?shù).