Hitunglah. 1. 4 + 7 × (6 – 7) 2. 10 – (-8 + 5) × 6 3. (6 – 23) × (-3)

1. $4 + 7 \times (6 - 7) = \boxed{-3}$

2. $10 - (-8 + 5) \times 6 = \boxed{52}$

3. $(6 - 23) \times (-3) = \boxed{51}$

4. $(-4)^2 + 25 : (-5)^2 = \boxed{5}$

5. $\dfrac{1}{3} + \left(-\dfrac{2}{3}\right)^2 = \boxed{\dfrac{5}{9}}$

6. $\dfrac{1}{4} - \dfrac{3}{7} : \dfrac{4}{7} = \boxed{\dfrac{1}{4}}$