Bài 6: Đặt tính rồi tính:
575 + 418 | 464 + 618 | 958 - 461 | 825 - 619 |
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Bài 7: Tìm X, biết:
a) X – 231 = 948 – 539 | b) 502 – X = 107 x 3 |
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Bài 8: Một hinh chữ nhật có chu vi 96m, chiêu dài hơn chiều rộng 8m. Tính chiêu dài và chiều rộng hinh chữ nhật?
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