Người ta đóng gói các hộp sữa chua thành các vỉ đều như nhau. Mỗi vỉ đóng 4 hộp sữa chua. Hỏi:

a) Có 16 424 hộp sữa chua thì đóng thành bao nhiêu vỉ như thế?

b) Chị Mai mua 1 vỉ sữa chua phải trả 24 000 đồng. Nếu chị Mai mua 6 hộp sữa chua thì phải trả bao nhiêu tiền?

Bài giải

a)
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b)
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                                                                                     ........................................................................................................................................

20 421 × 4

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26 251 × 3

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12 078 : 6

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81 649 : 4

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a) 20 307 × 4 + 15 643

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c) 75 876 – 11 708 × 3

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b) 54 000 + 33 684 : 4

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d) (15 652 – 3 147) : 5

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a) 5 000 + 2 000 × 2 = ..........................

(1 000 + 4 000) × 2 = ...........................

b) 80 000 – (50 000 + 20 000) = ..........

80 000 – 50 000 – 20 000 = .................

c) 30 000 × 2 : 6 = ...............................

30 000 : 6 × 2 = ...................................

24 000 + 6 000 × 3 = ...........................

(24 000 + 6 000) × 3 = .........................

(35 000 – 7 000) : 4 = ..........................

35 000 – 8 000 : 2 = ............................

48 000 : 2 : 4 = ...................................

48 000 : (2 × 4) = ...............................