1. 直接写出得数。
26 + 37 = 71 - 38 = 27 + 28 = 48 - 33 + 26 =
58 - 19 = 92 - 56 = 44 - 29 = 18 + 29 - 19 =
46 + 32 = 66 - 37 = 81 ÷ 9 = 31 + 13 - 20 =
74 - 36 = 37 + 29 = 72 - 34 = 66 - 29 + 12 =
63 - 29 = 34 + 38 = 24 + 58 = 8 × 8 ÷ 8 =
37 + 43 = 65 - 38 = 24 ÷ 8 = 2 × 4 × 6 =
52 - 24 = 39 + 24 = 31 - 17 = 33 + 33 + 33 =
47 + 33 = 55 - 29 = 43 - 15 = 66 - 22 - 22 =
26 + 37 = 71 - 38 = 27 + 28 = 48 - 33 + 26 =
58 - 19 = 92 - 56 = 44 - 29 = 18 + 29 - 19 =
46 + 32 = 66 - 37 = 81 ÷ 9 = 31 + 13 - 20 =
74 - 36 = 37 + 29 = 72 - 34 = 66 - 29 + 12 =
63 - 29 = 34 + 38 = 24 + 58 = 8 × 8 ÷ 8 =
37 + 43 = 65 - 38 = 24 ÷ 8 = 2 × 4 × 6 =
52 - 24 = 39 + 24 = 31 - 17 = 33 + 33 + 33 =
47 + 33 = 55 - 29 = 43 - 15 = 66 - 22 - 22 =
答案
1. 63 33 55 41
39 36 15 28
78 29 9 24
38 66 38 49
34 72 82 8
80 27 3 48
28 63 14 99
80 26 28 22
39 36 15 28
78 29 9 24
38 66 38 49
34 72 82 8
80 27 3 48
28 63 14 99
80 26 28 22
2. (
7 ×(
(
18 +(
97 -(
400 +(
4
)里最大能填几?7 ×(
4
)<34 (7
)× 6<45 5 ×(9
)<47(
7
)× 5<38 7 ×(9
)<64 9 ×(4
)<4418 +(
21
)<40 43 +(36
)<80 (78
)- 40<3997 -(
31
)>65 36 +(15
)<52 (84
)- 18<67400 +(
59
)<460 540 -(39
)>500 620 -(19
)>600答案
2. 4 7 9
7 9 4
21 36 78
31 15 84
59 39 19
7 9 4
21 36 78
31 15 84
59 39 19
3. 找规律,填一填。
32 - 23 = 9 × 1 = 9 42 - 24 = 9 × 2 = 18
63 - 36 = 9 ×(
94 - 49 =(
71 - 17 =(
(
(
32 - 23 = 9 × 1 = 9 42 - 24 = 9 × 2 = 18
63 - 36 = 9 ×(
3
)=(27
) 51 - 15 = 9 ×(4
)=(36
)94 - 49 =(
9
)×(5
)=(45
)71 - 17 =(
9
)×(6
)=(54
)(
81
)- 18 =(9
)×(7
)=(63
)(
91
)-(19
)=(9
)×(8
)= 72答案
3. 3 27 4
36 9 5
45 9 6
54 81 9
7 63 91
19 9 8
36 9 5
45 9 6
54 81 9
7 63 91
19 9 8
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