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Lớp 4 (Toán, TV, TA)
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1.
(30 + 6) : 3 = 30 : 3 + 6 : 3. Đúng hay sai?
đúng
sai
2.
(20 + 5) : 5 = 20 : 5 + 5 : 5. Đúng hay sai?
đúng
sai
3.
(28 + 4) : 4 = 28 : 4 - 4 : 4. Đúng hay sai?
đúng
sai
4.
21 : 3 + 18 : 3 = (21 + 18) : ?
2
3
18
5.
12 : 4 + 16 : 4 = (12 + 16) : ?
12
16
4
6.
14 : 7 - 7 : 7 = (14 - 7) : ?
14
7
0
7.
Tìm a biết: (a + 15) : 5 = 245 : 5 + 15 : 5
245
15
5
8.
Tìm b biết: (25 + b) : 5 = 25 : 5 + 20 : 5
25
20
5
9.
Tìm a biết: (a - 18) : 6 = 36 : 6 - 18 : 6
36
18
6
10.
Tìm a biết: (a - 32) : 16 = 640 : 16 - 32 : 6
640
32
16
Answer
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