题目内容

口算。
0.3×0.5= 4.5×0.2=
0.2×0.4= 0.6×2.5=
1.2×0.5= 1.4×0.3=
0.15；0.9；0.08；1.5；0.6；0.42
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我会口算．
0.4×6=		 0.08×7= 1.5×3=
0.638×100= 1.22×3= 4.07×10=
0.1×48= 243×0.01= 0.5×8=
0.5×15= 12.5×8= 0×4.2=
口算．
0.9×0.4= 31.4+6= 0.64÷4=
11
20
-
7
20
=
1
4
÷
1
6
=
3
4
×
1
2
=
3
5
-
1
4
=
8
9
÷4=
3
5
+
3
11
+
2
5
=		 1
8
9
-
3
4
-
1
4
=
口算．
0.38+0.06=		 （155+20）-65= 64.2+5.7=
17.05-4.58= 9800÷25÷4= 0÷78=
50-20÷5= 35×25×4=
口算：
0.16×5﹦		 1.78+2.2=
1.2×0.5-0.4= 0.7÷0.01=
2.5×0.4= 1.25×8÷1.25=
6.6÷0.66= 4÷0.8=
5.37×0+4.63= 9.6÷0.6=
12-3.97= 1.6+2.4×0.3=
口算：
0.6×2= 4.8÷0.6= 1.7+3= 4×9×0.25=
1.5×16= 9.6÷32= 2-0.09= 8.5-0.24-1.76=

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