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Lớp 4 (Toán, TV, TA)
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1.
a x ( b - c ) = a x b - a x c. Đúng hay sai?
đúng
sai
2.
a x ( b - c ) = a x b - c. Đúng hay sai?
đúng
sai
3.
a x ( b - c ) = b - a x c. Đúng hay sai?
đúng
sai
4.
1285 x ( 10 - 1 ) =
11565
11566
11567
5.
3156 x ( 10 + 1 ) =
34714
34715
34716
6.
2198 x ( 10 + 1 ) =
24177
24178
24179
Answer
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