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Tuần 23: Toán: Phép cộng phân số (khác mẫu số).
Các em xem trong SGK Toán trang 127
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Họ và tên:
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Lớp
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4A
4B
4C
4D
4E
4G
4H
4I
4K
4L
4M
Số thứ tự
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