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1. 直接写出得数。
67 + 23 = 35 + 45 = 42 + 39 = 72 - 46 + 28 =
90 - 34 = 55 + 37 = 740 - 40 = 62 - 32 + 48 =
61 - 18 = 70 ÷ 7 = 80 - 42 = 82 - 43 + 52 =
39 + 11 = 900 + 30 = 62 - 27 = 39 + 40 - 29 =
17 + 35 = 72 ÷ 9 = 46 + 44 = 54 + 12 - 15 =
96 - 90 = 30 × 2 = 11 × 6 = 27 + 65 - 16 =
74 - 27 = 60 ÷ 3 = 82 - 15 = 63 + 7 - 10 =
28 - 16 = 15 + 75 = 86 ÷ 2 = 6 × 3 ÷ 2 =
67 + 23 = 35 + 45 = 42 + 39 = 72 - 46 + 28 =
90 - 34 = 55 + 37 = 740 - 40 = 62 - 32 + 48 =
61 - 18 = 70 ÷ 7 = 80 - 42 = 82 - 43 + 52 =
39 + 11 = 900 + 30 = 62 - 27 = 39 + 40 - 29 =
17 + 35 = 72 ÷ 9 = 46 + 44 = 54 + 12 - 15 =
96 - 90 = 30 × 2 = 11 × 6 = 27 + 65 - 16 =
74 - 27 = 60 ÷ 3 = 82 - 15 = 63 + 7 - 10 =
28 - 16 = 15 + 75 = 86 ÷ 2 = 6 × 3 ÷ 2 =
答案
1. 90 80 81 54 56 92 700 78 43 10 38 91 50 930 35 50 52 8 90 51 6 60 66 76 47 20 67 60 12 90 43 9
2. 1 分 = (
70 秒 = (
1.70 米 = (
60
) 秒 1 分 30 秒 = (90
) 秒70 秒 = (
1
) 分 (10
) 秒 2 米 80 厘米 = (280
) 厘米1.70 米 = (
170
) 厘米 1 米 80 厘米 = (1.80
) 米答案
2. 60 90 1 10 280 170 1.80
3. □里最大能填几？
3 × □ ＜ 33 □ × 4 ＜ 48 66 ＞ □ × 6 84 ＞ □ × 4
2 × □ ＜ 64 68 ＞ 2 × □ 42 ＞ □ × 2 99 ＞ 9 × □
3 × □ ＜ 33 □ × 4 ＜ 48 66 ＞ □ × 6 84 ＞ □ × 4
2 × □ ＜ 64 68 ＞ 2 × □ 42 ＞ □ × 2 99 ＞ 9 × □
答案
3. 10 11 10 20 31 33 20 10
有 8 支球队参加小学生足球比赛，每两支球队比赛一场，一共要比赛多少场？
答案
思维提升
7+6+5+4+3+2+1=28(场)
7+6+5+4+3+2+1=28(场)
