一、口算。
63 + 8 =
80 - 8 =
78 + 8 - 50 =
86 - 7 =
43 + 40 =
92 - 70 - 7 =
47 + 5 =
67 - 9 =
20 + 65 - 9 =
31 - 9 =
5 + 76 =
65 - 20 - 6 =
6 + 38 =
57 - 30 =
25 + 60 + 7 =
63 - 6 =
61 + 30 =
58 - 9 + 40 =
66 + 4 =
23 - 5 =
54 - 9 - 6 =
76 - 40 =
44 + 7 =
70 + 4 - 30 =
5 + 18 =
64 - 5 =
87 - 70 + 8 =
74 - 7 =
33 + 20 =
23 + 40 - 5 =
63 + 8 =
80 - 8 =
78 + 8 - 50 =
86 - 7 =
43 + 40 =
92 - 70 - 7 =
47 + 5 =
67 - 9 =
20 + 65 - 9 =
31 - 9 =
5 + 76 =
65 - 20 - 6 =
6 + 38 =
57 - 30 =
25 + 60 + 7 =
63 - 6 =
61 + 30 =
58 - 9 + 40 =
66 + 4 =
23 - 5 =
54 - 9 - 6 =
76 - 40 =
44 + 7 =
70 + 4 - 30 =
5 + 18 =
64 - 5 =
87 - 70 + 8 =
74 - 7 =
33 + 20 =
23 + 40 - 5 =
答案
一、71 72 36
79 83 15
52 58 76
22 81 39
44 27 92
57 91 89
70 18 39
36 51 44
23 59 25
67 53 58
79 83 15
52 58 76
22 81 39
44 27 92
57 91 89
70 18 39
36 51 44
23 59 25
67 53 58
二、(
(
2 + (
(
(
9 + (
(
(
20 + (
(
11
)里应填几?(
11
) + 9 = 202 + (
29
) = 31(
60
) - 5 = 55(
21
) + 30 = 519 + (
61
) = 70(
95
) - 50 = 45(
80
) + 6 = 8620 + (
70
) = 90(
24
) - 8 = 16答案
二、11 29 60
21 61 95
80 70 24
21 61 95
80 70 24
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