Addition
90+99
189
100-25
75
5x12
60
18÷3
6
A salesman sold twice as much pears in the afternoon than in the morning. If he sold 360 kilograms of pears that day, how many kilograms did he sell in the morning and how many in the afternoon?
Therefore, the salesman sold 120 kg in the morning and 2X120=240 kg in the afternoon.
342+91
433
157-35
122
8x8
64
20÷5
4
farming field can be ploughed by 6 tractors in 4 days. When 6 tractors work together, each of them ploughs 120 hectares a day. If two of the tractors were moved to another field, then the remaining 4 tractors could plough the same field in 5 days. How many hectares a day would one tractor plough then?
144. Hence, each of the four tractors would plough 144 hectares a day.
1543+219
1762
258-143
115
13x5
65
48÷ 8
6
The first year, two cows produced 8100 litres of milk. The second year their production increased by 15% and 10% respectively, and the total amount of milk increased to 9100 litres a year. How many litres were milked from each cow each year?
3800
3256+4785
8041
568-365
203
15x8
120
144÷12
12
Susan drives from city A to city B. After two hours of driving she noticed that she covered 80 km and calculated that, if she continued driving at the same speed, she would end up been 15 minutes late. So she increased her speed by 10 km/hr and she arrived at city B 36 minutes earlier than she planned.
Find the distance between cities A and B.
So, the distance between cities A and B is 250 km.
10654+7823
18477
5897-4803
1094
15x15
225
680÷8
85
There are 24 students in a seventh grade class. They decided to plant birches and roses at the school's backyard. While each girl planted 3 roses, every three boys planted 1 birch. By the end of the day they planted 2424 plants. How many birches and roses were planted?
So, students planted 18 roses and 24 - x = 24 - 18 = 6 birches.