1. 直接写出得数。
87 - 56 = 61 - 29 = 19 + 56 = 60 + 10 - 30 =
63 + 19 = 99 ÷ 9 = 37 + 53 = 61 + 29 - 18 =
800 + 80 = 60 ÷ 2 = 85 - 60 = 24 ÷ 8 ÷ 3 =
67 + 30 = 40 × 2 = 57 + 16 = 14 ÷ 7 × 8 =
54 + 28 = 960 - 60 = 89 - 63 = 49 ÷ 7 × 5 =
97 - 26 = 18 + 38 = 72 - 56 = 44 + 46 - 27 =
10 × 6 = 29 + 11 = 66 ÷ 6 = 15 + 65 - 43 =
44 + 54 = 58 + 12 = 33 × 3 = 90 + 8 - 14 =
87 - 56 = 61 - 29 = 19 + 56 = 60 + 10 - 30 =
63 + 19 = 99 ÷ 9 = 37 + 53 = 61 + 29 - 18 =
800 + 80 = 60 ÷ 2 = 85 - 60 = 24 ÷ 8 ÷ 3 =
67 + 30 = 40 × 2 = 57 + 16 = 14 ÷ 7 × 8 =
54 + 28 = 960 - 60 = 89 - 63 = 49 ÷ 7 × 5 =
97 - 26 = 18 + 38 = 72 - 56 = 44 + 46 - 27 =
10 × 6 = 29 + 11 = 66 ÷ 6 = 15 + 65 - 43 =
44 + 54 = 58 + 12 = 33 × 3 = 90 + 8 - 14 =
答案
1. 31 32 75 40 82 11 90 72 880 30 25 1 97 80 73 16 82 900 26 35 71 56 16 63 60 40 11 37 98 70 99 84
2. 找规律填数。
(1)780,800,(
(2)903,902,901,(
(3)550,600,650,700,(
(1)780,800,(
820
),840,(860
),(880
)。(2)903,902,901,(
900
),(899
),(898
)。(3)550,600,650,700,(
750
),(800
),(850
)。答案
2. (1) 820 860 880 (2) 900 899 898 (3) 750 800 850
3. 在(
540 -(
400 +(
500
)里填合适的数。540 -(
500
)= 40 40 +(400
)= 440 (600
)+ 200 = 800400 +(
300
)= 700 590 -(90
)= 500 50 +(200
)= 250答案
3. 500 400 600 300 90 200
欢欢今年 9 岁,爸爸今年 40 岁,当爸爸 52 岁时,欢欢多少岁?
视频精讲
视频精讲
答案
思维提升
40 - 9 = 31(岁) 52 - 31 = 21(岁)
40 - 9 = 31(岁) 52 - 31 = 21(岁)
登录