题目内容

直接写得数．
2
9
+
1
3
=		 28÷
7
8
=
1
3
-
1
4
=
5
8
×16=		 0.3×0.9= 0.77+3.3=
1.25×32= 75×10%= 2.8-1.9=
9+7.2= 3.6÷1.8= 0.5-0.07=
分析：根据分数加减法和分数乘除法、小数加减法的计算方法以及百分数的应用进行解答即可得到答案．
解答：解：
2
9
+
1
3
=
5
9
 28÷
7
8
=32
1
3
-
1
4
=
1
12
5
8
×16=10		 0.3×0.9=0.27 0.77+3.3=4.07
1.25×32=40 75×10%=7.5 2.8-1.9=0.9
9+7.2=16.2 3.6÷1.8=2 0.5-0.07=0.43
点评：此题主要考查的是分数加减法和分数乘除法、小数加减法的计算方法以及百分数的应用．
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