0.62-0.32=
 
 
9.8×0.5×2=
 
0.25×4=
 
9.46×10=
 
12÷0.6=
 
1
3
-
1
10
=
 
2.4-0.6=
 
0.4×0.5=
 
1÷0.25=
 
1
7
+
6
7
-
5
8
=
 
9.6÷0.2=
 
0.56÷0.8=
 
9.13×0=
 
53.4÷10=
 
8.5+1.8=
 
0.36÷0.4=
 
60×0.8=
 
1÷0.25=
 
分析:根據(jù)小數(shù)、分?jǐn)?shù)加、減、乘、除法的計(jì)算法則,直接進(jìn)行口算即可.
解答:解:
0.62-0.32=0.3;  9.8×0.5×2=9.8; 0.25×4=1;
9.46×10=94.6; 12÷0.6=20;
1
3
-
1
10
=
7
30
2.4-0.6=1.8; 0.4×0.5=0.2; 1÷0.25=4;
1
7
+
6
7
-
5
8
=
3
8
9.6÷0.2=48; 0.56÷0.8=0.7;
9.13×0=0; 53.4÷10=5.34; 8.5+1.8=10.3;
0.36÷0.4=0.9; 60×0.8=48; 1÷0.25=4.
故答案為:0.3; 9.8; 1; 94.6; 20;
7
30
;1.8; 0.2;  4;
3
8
 48; 0.7; 0; 5.34;10.3;0.9; 48; 4.
點(diǎn)評(píng):此題考查的目的是理解掌握小數(shù)、分?jǐn)?shù)四則運(yùn)算的計(jì)算法則,并且能夠正確熟練地進(jìn)行口算,提高口算能力.
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