信息窗1练习设计第6题答案
35 2/5 14
2 7 14
35 :2 = 7 :2/5
2 3/4 3/2
16 1/8 2
信息窗1练习设计第7题答案
80 ÷ 5 = 16
16 × 4 = 64(枚)
信息窗1练习设计第8题答案
6x = 8 × 18
x = 24
6.9x = 23 × 3
x = 10
16x = 5 × 40
x = 12.5
1/8x = 1/4 × 1/5
x = 2/5
1.5x = 4.5 × 3
x = 9
2.1x = 3 × 0.7
x = 1
信息窗1练习设计第9题答案
(1)5 :8 = 40 :x
5x = 40 × 8
x = 64
(2)x :3/4 = 1/5 :2/5
x = 3/8
信息窗1练习设计第10题答案
(1)3 + 5 = 8
男:320 × 3/8 = 120(人)
女:320 × 5/8 = 200(人)
(2)120 + 10 = 130(人)
200 + 10 = 210(人)
130 :210 = 13 :21