10. The four numbers 8, 6 and 4 are composed of 24 (each number is used at least once)

10. The four numbers 8, 6 and 4 are composed of 24 (each number is used at least once)

10×(8-6)+4=24
Hey, hey, look at this equation carefully, it hasn't changed the order of the four numbers! Give it points!
Of course, there are many other equations, which will not be repeated here

8, 32, 16 with a number______ It can be proportional

Let 8 and 16 be the two external terms of the proportion, then the number to be matched is: 8 × 16 △ 32 = 4

A number is composed of three 1 / 4 and 10% sums. Find the number

85 or 17 / 20
Three quarters is three quarters, which is 0.75, 10% is 0.1. The sum is 0.85 or 17 / 20
But not 85%
Because percentage is the ratio of two numbers, not one number

There are four classes. There are 83 students in class 1 and class 2, 86 students in class 2 and class 3 and 88 students in class 3 and class 4. How many students are there in class 1 and class 4?

The total number of class 1234 is 83 + 88 minus 23
83+88-86=85

There are 96 students in class (1) and class (2), 89 students in class (2) and class (3), and 86 students in class (3) and class (4). How many students are there in class (1) and class (4)?

96 + 86-89 = 182-89 = 93 (people) answer: (1) class and (4) class have 93 people

The sixth grade students of an experimental primary school are divided into three groups to participate in tree planting activities. The number ratio of the first group to the second group is 5:4, and the number ratio of the second group to the third group is 3:2?

The number ratio of the first group to the second group is 5:4, the number ratio of the second group to the third group is 3:2, so the number of the first group: the second group: the third group = 15:12:8, the number of the first group is less than the sum of the second group and the third Group 15 people can deduce the first group / (the second group + the third group) = 15:20, let the first group be x, then x / (x + 15) = 15 / 20, x = 4

The sixth grade students of Qingjiang primary school were divided into three groups to participate in tree planting activities. The ratio of the first group to the second group was 5:4, and the ratio of the second group to the third group was 2:3,
It is known that the sum of the number of the first group and the second group is 18 more than that of the third group?

The ratio of the second group to the third group is 2:3, that is, 4:6
The ratio of the first group, the second group and the third group was 5:4:6
5+4-6=3
18/3=6
6 * (5 + 4 + 6) = 90

There are 175 students in the fifth and sixth grade of the experimental primary school. They are divided into three groups to participate in tree planting activities. The number ratio of the first group to the second group is 5:4, and the third group has 67 people. How many people are there in the first and second groups?

Group 1: (175-67) × 55 + 4 = 108 × 59 = 60 (people) group 2: (175-67) × 45 + 4 = 108 × 49 = 48 (people) answer: group 1: 60 people, group 2: 48 people