Đặt tính rồi tính a) 457,75 + 109,18 b) 1142,45 - 674,18 .......................................... ............................................

Câu hỏi :

Đặt tính rồi tính

 a) 457,75   +    109,18                                                b) 1142,45 - 674,18

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c) 240,6   ×    3,5                                                    d)   17,55   :   3,9

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