We will solve the different types of problems involving addition and subtraction together.
To show the problem involving both addition and subtraction, we first group all the numbers with ‘+’ and ‘-‘ signs. We find the sum of the numbers with ‘+’ sign and similarly the sum of all the numbers with ‘-‘ sign and then find the difference.
1. Solve 3811 + 4629 – 1821 – 3164
Solution:
Step I: Add the numbers with ‘+’ sign. Step II: Add the numbers with ‘-’ sign. Step III: Subtract the sum of the numbers with ‘-’ sign from the sum of the numbers with ‘+’ sign. |
Note: If there is no sign before a number it means ‘+’ sign.
Answer: 3811 + 4629 - 1821 - 3164 = 3455
2. In godown A, there are 41,929 bags of rice and 31930 bags of wheat. In godown B, there are 31,556 bags of rice and 40,999 bags of wheat. Which godown contains more number of bags and by how much?
Godown A Number of bags of rice = 41929
Number of bags of wheat = + 31930
Total number of bags = 73859
Godown B Number of bags of rice = 31556
Number of bags of wheat = + 40999
Total number of bags = 72555
Total number of bags in godown A - Total number of bags in godown B
= 73,859 – 72,555
= 1,304
Therefore, godown A contains 1,304 bags more than that in godown B.
Questions and Answers on Addition and Subtraction Together:
I. Solve the following:
(i) 5406 + 1809 – 3281
(ii) 2805 + 4961 – 1629 - 128
(iii) 3619 + 5410 – 2018 – 3110
(iv) 1529 + 402 + 506 – 1200
Answer:
(i) 3934
(ii) 6009
(iii) 3901
(iv) 1237
II. Ron bought a plot for $2,55,000. He constructed a house spending $5,45,328 and sold it for $10,45,350. What is his gain?
Answer:
II. $2,45,022
III. Mr. X has a deposit of $3,68,750. Mr. Y has $7592 less than Mr. X. Mr. Z has $50,490 more than Mr. X. Calculate the deposit of Mr. Y and Mr. Z.
Answer:
III. Mr. Y : $ 361158
Mr. Z. : $ 419240
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