请帮我生成这张图片里面所有题目的讲解---Here is the extracted content from the image: **计算日签 (Calculation Daily Check-in)** 6.4 + 3.5 = 9.9 99.99 - 98.98 = 1.01 2.992 + 4.104 = 7.096 2.662 + 3.773 = 6.435 9.0 - 8.1 + 7.2 = 8.1 (Annotation: 0.9 above 9.0-8.1, 8.1 above 0.9+7.2) 48.48 + 37.13 - 30.30 = 55.31 (Annotation: 85.61 above 48.48+37.13) 4.724 + 3.613 - 2.391 = 5.946 (Annotation: 8.337 above 4.724+3.613) 476 × 78 = 37128 529 ÷ 23 = 23 188 × (70 + 14) = 15792 (Annotation: 84 above 70+14) **思维日签 (Thinking Daily Check-in)** 1. 鸡兔同笼，鸡的数量是兔的2倍，一共共有24条腿，那么有 [6] 只鸡， [3] 只兔。 (Marked as incorrect) 2. 鸡兔同笼，共27只，已知两种动物的腿数相同，那么有 [9] 只鸡， [18] 只兔。 (Marked as correct) **Other Text** 第 7