1. 直接写出得数。
15 + 74 =
42 + 22 =
87 - 35 =
26 + 53 =
77 - 7 =
93 - 63 =
57 + 32 =
88 - 64 =
94 - 90 =
41 + 26 =
66 - 44 =
53 - 12 =
13 + 35 =
63 - 21 =
42 + 51 =
67 + 11 =
29 - 19 =
73 - 42 =
21 + 66 =
99 - 90 =
15 + 23 =
40 + 16 =
44 + 35 =
56 - 23 =
18 + 40 =
85 - 44 =
75 - 23 =
33 + 13 =
36 - 24 =
39 + 50 =
22 + 16 =
65 - 25 =
15 + 74 =
42 + 22 =
87 - 35 =
26 + 53 =
77 - 7 =
93 - 63 =
57 + 32 =
88 - 64 =
94 - 90 =
41 + 26 =
66 - 44 =
53 - 12 =
13 + 35 =
63 - 21 =
42 + 51 =
67 + 11 =
29 - 19 =
73 - 42 =
21 + 66 =
99 - 90 =
15 + 23 =
40 + 16 =
44 + 35 =
56 - 23 =
18 + 40 =
85 - 44 =
75 - 23 =
33 + 13 =
36 - 24 =
39 + 50 =
22 + 16 =
65 - 25 =
答案
1. 89 64 52 79
70 30 89 24
4 67 22 41
48 42 93 78
10 31 87 9
38 56 79 33
58 41 52 46
12 89 38 40
70 30 89 24
4 67 22 41
48 42 93 78
10 31 87 9
38 56 79 33
58 41 52 46
12 89 38 40
2. 不计算,在得数大的算式后面画“√”。
$\begin{cases} 62 + 30 \quad □ \\ 62 + 33 \quad □ \end{cases}$
$\begin{cases} 72 - 12 \quad □ \\ 72 - 22 \quad □ \end{cases}$
$\begin{cases} 58 + 11 \quad □ \\ 78 - 11 \quad □ \end{cases}$
$\begin{cases} 62 + 30 \quad □ \\ 62 + 33 \quad □ \end{cases}$
$\begin{cases} 72 - 12 \quad □ \\ 72 - 22 \quad □ \end{cases}$
$\begin{cases} 58 + 11 \quad □ \\ 78 - 11 \quad □ \end{cases}$
答案
2. 62+33后面画√
72-12后面画√
58+11后面画√
3. 填表。
(1)
(2)
(1)
(2)
答案
3. (1) 49 11 21 (2) 30 99 74
小虎在做一道减法算式时,错把被减数67看成了60,结果是20,正确的结果应该是(
27
)。答案
27
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