Toán Lớp 5: Tính hợp lí : 1994x967+1995x133

1994 x 867 + 1995 x 133 =1994 x 867 +(1994 + 1)x 133 =1994 x967 +1994 x 133 + 133 x 1 =1994 x (867 + 133) + 133 =1994 x1000 +133 =194000 +133 =194133

1994xx867+1995xx133 =1994xx867+(1994+1)xx133 =1994xx867+1994xx133+133 =1994xx(867+133)+133 =1994xx1000+133 =1994000+133 =1994133

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Toán Lớp 5: Tính hợp lí : 1994×967+1995×133

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