3rd Maths: Term 3 Unit 7 - Information Processing
Mental Arithmetic
Learning Objective: Able to add and subtract single digit numbers and two digit numbers mentally.
Mental Arithmetic Problems
Able to add and subtract single digit numbers and two digit numbers mentally:
1. In a tree planting ceremony, 6 coconut saplings and 5 neem saplings are planted. Find the total number of saplings planted.
6 + 5 = 11
2. There are 5 tender coconuts in a tree. If they pick 3 tender coconuts, then find the remaining tender coconuts?
5 – 3 = 2
3. 46 boys and 27 girls visited a park on Sunday. Find the total number of boys and girls who visited the park?
46 + 27 = 40 + 20 + 6 + 7 = 60 + 6 + 7 = 66 + 7 = 73
4. 50 pens are in a box. Out of which, 34 pens are given to the students. Find the number of pens left?
50 – 34 = 16
5. 70 balls are given to 7 persons. How many balls are given to each person?
70 ÷ 7 = 10
6. 8 books can be arranged in a row. In how many rows can 48 books be arranged?
48 ÷ 8 = 6
7. 10 pens can be kept in a box. How many boxes are needed to keep 100 pens?
100 ÷ 10 = 10