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1.直接写出得数。(每题1★)
46+27=
39-14=
17+36=
43-19=
28+54=
59-33=
39+44=
53-28=
25+64=
69-42=
68-39=
61+28=
83-47=
34+29=
65-37=
38+57=
66-27=
47+32=
77-39=
52+27=
55+23=
90-55=
52+19=
76-27=
43+26=
82-46=
18+71=
92-56=
31+58=
84-37=
46+27=
39-14=
17+36=
43-19=
28+54=
59-33=
39+44=
53-28=
25+64=
69-42=
68-39=
61+28=
83-47=
34+29=
65-37=
38+57=
66-27=
47+32=
77-39=
52+27=
55+23=
90-55=
52+19=
76-27=
43+26=
82-46=
18+71=
92-56=
31+58=
84-37=
答案
1. 83 39 89 25 79 36
89 38 89 27 79 47
89 38 89 27 79 47
2.用竖式计算。(每题3★)
45+6-31=
83-45+25=
24+48-37=
50-46+17=
45+6-31=
83-45+25=
24+48-37=
50-46+17=
答案
2. 20 63 35 21(竖式略)
