Toán Lớp 6: a) 12.39-39.12
B) ( -147)-(13-147)
Giúp ah
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Toán Lớp 6: a) 12.39-39.12
B) ( -147)-(13-147)
Giúp ah
Comments ( 2 )
a)12.39 – 39.12
=468 – 468
=0
b)(-147) – (13 – 147)
=-147 – 13 + 147
=(-147 + 147) – 13
=0 – 13
=-13
$\text{@Yang}$
a) 12. 39 – 39. 112
= 39. ( 12 – 112)
= 39. ( – 100)
= -3900
b) ( – 147) – ( 13 – 147)
= ( – 147) – 13 + 147
= ( 147 – 147) – 13
= 0 – 13
= -13