Toán Lớp 3: Bài 3:Tính nhẩm
a)85 +15
b)50+27
c)46+54
d)21+29
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Toán Lớp 3: Bài 3:Tính nhẩm
a)85 +15
b)50+27
c)46+54
d)21+29
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