Toán Lớp 2: Tính bằng cách thuận tiện:
2015 x 8 + 7 x 2015 – 2015 x 5
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Toán Lớp 2: Tính bằng cách thuận tiện:
2015 x 8 + 7 x 2015 – 2015 x 5
Comments ( 2 )
=2015 x (8+7-5)
=2015 x 10
=20150