Toán Lớp 4: Nhanh lên 1p thui
Tính nhanh:
19 + 28 + 81 + 72.
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Toán Lớp 4: Nhanh lên 1p thui
Tính nhanh:
19 + 28 + 81 + 72.
Comments ( 2 )
= (19 + 81) + (28 + 72).
= 100 + 100.
= 200.