初一课外练习数学填空题及答案20题1. 36 ÷ (2 + 4) + 5 × 2 = ______   答案：92. (3 × 8) − 4 × 5 + 6 × 2 = ______   答案：223. 16 ÷ 8 × (2 + 3) + 4 = ______   答案：244. (4 × 5) − 3 × (7 − 4) = ______   答...