一、直接写出得数。(每题1分,共32分)
0+9=
9-4=
5-2+4=
6-2-1=
7-0=
7+2=
2+7-6=
7+2-5=
6+2=
8-8=
7-1+3=
4+2-0=
9-4=
5+3=
4+5-1=
0+8-3=
4+4=
8-4=
1-0+4=
9-2+0=
8-7=
3+6=
9-9+3=
3-2+8=
3+2=
5-5=
5+3-7=
2+2+3=
9-1=
4+5=
5-1+3=
8-6+5=
0+9=
9
9-4=
5
5-2+4=
7
6-2-1=
3
7-0=
7
7+2=
9
2+7-6=
3
7+2-5=
4
6+2=
8
8-8=
0
7-1+3=
9
4+2-0=
6
9-4=
5
5+3=
8
4+5-1=
8
0+8-3=
5
4+4=
8
8-4=
4
1-0+4=
5
9-2+0=
7
8-7=
1
3+6=
9
9-9+3=
3
3-2+8=
9
3+2=
5
5-5=
0
5+3-7=
1
2+2+3=
7
9-1=
8
4+5=
9
5-1+3=
7
8-6+5=
7
答案:
9 5 7 3
7 9 3 4
8 0 9 6
5 8 8 5
8 4 5 7
1 9 3 9
5 0 1 7
8 9 7 7
7 9 3 4
8 0 9 6
5 8 8 5
8 4 5 7
1 9 3 9
5 0 1 7
8 9 7 7
二、算一算,填一填。(每空1分,共22分)
1. 2→+7
2. 9→-3
3.
4.
1. 2→+7
9
→-45
→-50
→+99
→-63
2. 9→-3
6
→+28
→-71
→-01
→+89
3.
7
→+29
→-63
→+25
→+16
→-60
→+774.
8
→-44
→+37
→+29
→-36
→+28
→+19
答案:
1. 9 5 0 9 3
2. 6 8 1 1 9
3. 7 9 3 5 6 0
4. 8 4 7 9 6 8
2. 6 8 1 1 9
3. 7 9 3 5 6 0
4. 8 4 7 9 6 8
三、在□里填合适的数。(每式1分,共12分)
2+
3+6-
8-
3+2+
4-
9-6+
8-
9-7-
3
+6-5= 42+
3
-5= 03+6-
2
= 77
-2-4= 18-
2
+3= 93+2+
0
= 57
-5+7= 94-
3
+4= 59-6+
5
= 84
+2+3= 98-
8
+6= 69-7-
2
= 0
答案:
3 3 2
7 2 0
7 3 5
4 8 2
7 2 0
7 3 5
4 8 2
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