1.直接写出得数。(每题1★)
6.7+7.6=
1.15+3.75=
20.4-6.3=
2.53+1.62=
17.8-5.6=
7.31-0.6=
5.49-2.3=
13.21+7.1=
6.03+0.97=
7.6+1.35=
27.69-9.3=
4.67+15.33=
15.6-8.7=
2.72+1.65=
30.2-0.9=
6.7+7.6=
1.15+3.75=
20.4-6.3=
2.53+1.62=
17.8-5.6=
7.31-0.6=
5.49-2.3=
13.21+7.1=
6.03+0.97=
7.6+1.35=
27.69-9.3=
4.67+15.33=
15.6-8.7=
2.72+1.65=
30.2-0.9=
答案
1. 14.3 4.9 14.1
4.15 12.2 6.71
3.19 20.31 7
8.95 18.39 20
6.9 4.37 29.3
4.15 12.2 6.71
3.19 20.31 7
8.95 18.39 20
6.9 4.37 29.3
2.列竖式计算。(每题4★)
33.29+17.64=
53.6+7.88=
8.51−6.67=
+
+ 图1
−
33.29+17.64=
53.6+7.88=
8.51−6.67=
+
+ 图1
−
答案
2. 50.93 61.48 1.84
(竖式略)
(竖式略)
3.计算下面各题,怎样简便就怎样算。(每题4★)
8.36+8.79+2.21
27.89−(8.89+1.39)
240÷[32÷(19−11)]
36.9−7.8−16.9−2.2
8.36+8.79+2.21
27.89−(8.89+1.39)
240÷[32÷(19−11)]
36.9−7.8−16.9−2.2
答案
3. 19.36 17.61
60 10
60 10
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