Rekenvolgorde met letters
Herleid.
1p
\(5 ⋅ x - 6 ⋅ 2 x\)
○
\(5 ⋅ x - 6 ⋅ 2 x = 5 x - 12 x = -7 x\)
1p
Herleid.
1p
\(6 ⋅ -2 x + 4 ⋅ -5 x\)
○
\(6 ⋅ -2 x + 4 ⋅ -5 x = -12 x - 20 x = -32 x\)
1p
Herleid.
1p
\(-3 x ⋅ 4 y - 5 x ⋅ -2 y\)
○
\(-3 x ⋅ 4 y - 5 x ⋅ -2 y = -12 x y + 10 x y = -2 x y\)
1p
Herleid.
1p
\(-x ⋅ 4 x + 2 x ⋅ 5 x\)
○
\(-x ⋅ 4 x + 2 x ⋅ 5 x = -4 x^{2} + 10 x^{2} = 6 x^{2}\)
1p
Herleid.
1p
\(2 a - 1 - 3 ⋅ 6 a\)
○
\(2 a - 1 - 3 ⋅ 6 a = 2 a - 1 - 18 a = -16 a - 1\)
1p
Herleid.
1p
\(-3 a ⋅ 6 b ⋅ -2 c + 4 x\kern{-.8pt}y\kern{-.8pt}z\)
○
\(-3 a ⋅ 6 b ⋅ -2 c + 4 a b c = 36 a b c + 4 a b c = 40 a b c\)
1p
Herleid.
1p
\(-4 a + 5 ⋅ 2 a + 3 a\)
○
\(-4 a + 5 ⋅ 2 a + 3 a = -4 a + 10 a + 3 a = 9 a\)
1p
Herleid.
1p
\(6 p + p ⋅ -3 p + 2 p\)
○
\(6 p + p ⋅ -3 p + 2 p = 6 p - 3 p^{2} + 2 p = -3 p^{2} + 8 p\)
1p
Herleid.
1p
\(-5 x y - 4 x + 6 x ⋅ y - 2 y\)
○
\(-5 x y - 4 x + 6 x ⋅ y - 2 y = -5 x y - 4 x + 6 x y - 2 y = x y - 4 x - 2 y\)
1p