轻松算吧
30 × 5 = 14 × 2 = 21 × 4 = 400 × 4 = 41 × 2 + 68 =
6 × 70 = 5 × 11 = 23 × 2 = 500 × 8 = (121 - 99) × 4 =
30 × 5 = 14 × 2 = 21 × 4 = 400 × 4 = 41 × 2 + 68 =
6 × 70 = 5 × 11 = 23 × 2 = 500 × 8 = (121 - 99) × 4 =
答案
150 28 84 1600 150
420 55 46 4000 88
420 55 46 4000 88
1. 填一填。
365 = (
4269 = (
365 = (
3
) × 100 + (6
) × 10 + (5
) × 14269 = (
4
) × 1000 + (2
) × 100 + (6
) × 10 + (9
) × 1答案
1. 3 6 5 4 2 6 9
2. 脱式计算。
6 × 7 + 7
40 × 4 + 59
(219 - 188) × 3
9 × 6 + 6
60 × 8 - 170
300 × 4 + 1320
6 × 7 + 7
40 × 4 + 59
(219 - 188) × 3
9 × 6 + 6
60 × 8 - 170
300 × 4 + 1320
答案
2. 49 219 93 60 310 2520
3. 幸福小区里共栽了13棵桂花树,栽的冬青比桂花树的3倍多8棵,栽了多少棵冬青?
答案
13 × 3 + 8 = 47(棵)
4. 请你写出整十数乘一位数且积是180的乘法算式。(至少写出2个不同的乘法算式)
答案
4. 180 × 1 = 180
90 × 2 = 180
60 × 3 = 180
30 × 6 = 180
20 × 9 = 180
90 × 2 = 180
60 × 3 = 180
30 × 6 = 180
20 × 9 = 180
5. 大熊猫花花每周大约要吃110千克竹子,一个月按4周计算,饲养员准备500千克竹子够吗?
答案
4 × 110 = 440(千克)
440 < 500 够
440 < 500 够
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