(1) 3 * (- 12) - (- 5) * 6 + 6 = 0 (2) 6 * (- 6 + 5 + 1) = 0 (3) by calculating (1), (2) what do you find after two questions? (4) calculate according to your findings: - 3.14 * 35.2 + 6.28 * (- 23.3) - 1.75 * 36.4 = teach me this question! Write down the meaning, that's better!

(1) 3 * (- 12) - (- 5) * 6 + 6 = 0 (2) 6 * (- 6 + 5 + 1) = 0 (3) by calculating (1), (2) what do you find after two questions? (4) calculate according to your findings: - 3.14 * 35.2 + 6.28 * (- 23.3) - 1.75 * 36.4 = teach me this question! Write down the meaning, that's better!

(1) 3 * (- 12) - (- 5) * 6 + 6 = 0 (2) 6 * (- 6 + 5 + 1) = 0 (3) through the calculation of (1) and (2), what do you find? I found: the product of different sign multiplication is negative; the product of the same sign multiplication is positive. (4) according to your calculation: - 3.14 * 35.2 + 6.28 * (- 23.3) - 1.75 * 36.4 = -110.528-146.324-63.7 =