《2025年口算训练六年级数学上册北师大版双色升级版》

60% + 20% = (80)%
9.7% + 5.3% = (15)%
25% + 44% = (69)%
45% - 23% = (22)%
1 - 65% = (35)%
1 - 20% - 50% = (30)%
1 - 35% - 45% = (20)%
1 - 15% - 25% = (60)%
1 - 22.7% - 7.3% = (70)%
200 × (1 - 30%) = (140)
300 × (1 - 40%) = (180)
400 × (60% - 50%) = (40)
500 × (22% + 28%) = (250)
(500 + 200) × 30% = (210)
(500 - 200) × 30% = (90)
(600 + 800) × 12% = (168)

答案： 解析：本题考查百分数的加减法以及百分数与整数的乘法运算。
答案：
$60\% + 20\% = 80\%$
$9.7\% + 5.3\% = 15\%$
$25\% + 44\% = 69\%$
$45\% - 23\% = 22\%$
$1 - 65\% = 35\%$
$1 - 20\% - 50\% = 30\%$
$1 - 35\% - 45\% = 20\%$
$1 - 15\% - 25\% = 60\%$
$1 - 22.7\% - 7.3\% = 70\%$
$200 × (1 - 30\%) = 140$
$300 × (1 - 40\%) = 180$
$400 × (60\% - 50\%) = 40$
$500 × (22\% + 28\%) = 250$
$(500 + 200) × 30\% = 210$
$(500 - 200) × 30\% = 90$
$(600 + 800) × 12\% = 168$

6 ÷ 20% = 30
54 ÷ 60% = 90
63 ÷ 90% = 70
8.5 ÷ 50% = 17
0.72 ÷ 2% = 36
0.32 ÷ 80% = 0.4
21.2 ÷ 10% = 212
12.5 ÷ 25% = 50
90 × 20% = 18
200 × 50% = 100
70 × 12% = 8.4
500 × 25% = 125
800 × 24% = 192
1500 × 4% = 60
120 × 60% = 72
60 × 0.32% = 0.192
50 × 0.18% = 0.09
40 × 0.24% = 0.096

答案： 解析：本题考查百分数的除法和乘法运算。
答案：
$6 ÷ 20\% = 6 ÷ 0.2 = 30$
$54 ÷ 60\% = 54 ÷ 0.6 = 90$
$63 ÷ 90\% = 63 ÷ 0.9 = 70$
$8.5 ÷ 50\% = 8.5 ÷ 0.5 = 17$
$0.72 ÷ 2\% = 0.72 ÷ 0.02 = 36$
$0.32 ÷ 80\% = 0.32 ÷ 0.8 = 0.4$
$21.2 ÷ 10\% = 21.2 ÷ 0.1 = 212$
$12.5 ÷ 25\% = 12.5 ÷ 0.25 = 50$
$90 × 20\% = 90 × 0.2 = 18$
$200 × 50\% = 200 × 0.5 = 100$
$70 × 12\% = 70 × 0.12 = 8.4$
$500 × 25\% = 500 × 0.25 = 125$
$800 × 24\% = 800 × 0.24 = 192$
$1500 × 4\% = 1500 × 0.04 = 60$
$120 × 60\% = 120 × 0.6 = 72$
$60 × 0.32\% = 60 × 0.0032 = 0.192$
$50 × 0.18\% = 50 × 0.0018 = 0.09$
$40 × 0.24\% = 40 × 0.0024 = 0.096$

(1) 该小区这周产生的有害垃圾占生活垃圾的(2)%。
(2) 如果该小区这周共产生9吨生活垃圾,那么这周产生的其他垃圾是(4.86)吨。

答案： 解析：题目考查扇形统计图的相关知识。扇形统计图中的整个圆表示总数，圆内各个扇形占整个圆百分比的和等于$100\%$。
（1）观察扇形统计图可知，其他垃圾占比为$54\%$，厨余垃圾占比为$36\%$，可回收物占比为$8\%$，所以有害垃圾占比为$1-54\%-36\%-8\%=2\%$。
答案：$2$。
（2）已知这周共产生$9$吨生活垃圾，其他垃圾占比为$54\%$，所以这周产生的其他垃圾重量为$9×54\%=4.86$（吨）。
答案：$4.86$。