CHAPTER 5: ADDITION – ARITHMETIC STANDARD II NOTES
Add numbers to get a sum not exceeding 999
Examples
EXERCISE 19
Add the following objects
Adding numbers without carrying forward to obtain sum not exceeding 1000.
Horizontal addition
Examples
32 + 15 =
solution
3 2 + 1 5 = 4 7
136 + 723 =
Solution
136 + 723 = 859
NOTE
- Add one with ones
- Add tens with tens
- Add hundred with hundreds
EXERCISE 20
Add the following horizontally
1. 225 + 243 =
2. 366 + 232 =
3. 316 + 473 =
4. 45 + 12 =
5. 625 + 204 =
6. 273 + 316 =
7. 225 + 243 =
8. 501 + 165 =
9. 770 + 229 =
EXERCISE 21
Add the following numbers
1. 41 + 123 =
2. 78 + 210 =
3. 441 + 203 =
4. 94 + 605 =
5. 441 + 102 =
6. 71 + 250 =
7. 396 + 63 =
8. 273 + 332 =
9. 554 + 17 =
Vertical addition
First, add ones. Write the answer in the ones position. Then, add tens and finally add hundreds. Write the answer in the tens position.
Example 1.
H T O
5 3 2
+ 2 6 4
7 9 6
Example 2.
H T O
2 1 6
+ 1 0 2
3 1 8
Example 3
2 1 4
+1 2 3
3 3 7
EXERCISE 22
Add the following vertically
1. 5 1 8 36 0 5
+ 3 7 0 + 2 2 3
_____________
1. 3 4 5 4 2 0
+ 4 1 2 + 4 2 5
______________
EXERCISE 23
Add the following
1. 203
+ 523
2. 503
+335
3. 644
+353
4. 522
+241
5. 330
+425
6. 432
+ 382
7. 499
+111
8. 283
+182
9. 309
+150
ii. Adding numbers with carrying forward with a sum not exceeding 1000
Horizontally
Example 1.
3 7 9 + 1 4 1 = 512
Example 2.
128 + 706 = 834
Example 3.
561 + 180 = 741
EXERCISE 23
1. 598 + 162 =
2. 279 + 612 =
3. 337 + 216 =
4. 555 + 236 =
5. 380 + 139 =
6. 625 + 204 =
7. 554 + 333 =
8. 716 + 250 =
9. 273 + 316 =
EXERCISE 24
Add the following
1. 44 + 37 =
2. 463 + 308 =
3. 238 + 322 =
4. 444 + 229 =
5. 253 + 317 =
6. 247 + 431 =
7. 434 + 160 =
8. 395 + 102 =
Adding vertically
Example
H T O
2 7 0
+ 6 4 9
NOTE:
O – Stand for ones
T – Stand for tens
H – Stand for hundreds
EXERCISE 25
Add the following vertically
4 6 3
+ 3 0 8
_________
3 6 1
+ 4 7 5
_________
6 4 6
+ 1 2 7
___________
1 6 7
+ 3 9 0
____________
6 8 4
+ 2 1 7
___________
4 4 4
+ 5 2 3
____________
6 7 1
+ 3 3 6
_________
5 3 5
+ 2 4 2
_______
EXERCISE 26
Add the following
2 2 8
+1 2 5
__________
5 7 6
+1 1 5
__________
7 1 7
+1 3 6
______
1 5 9
+4 2 6
________
6 4 6
+1 2 7
__________
4 4 9
+1 1 1
_______
5 6 6
+1 1 5
_________
4 3 2
+3 8 4
_________
2 9 0
+4 6 0
_________
Word problems involving addition of whole numbers
Example 1
Kibaga primary school has 342 boys. It also has 307girls. How many pupils are there in total?
Solution
342 boys
+ 307 girls
649 pupils
Example 2
There are 206 chocolates in a blue box. A white box has 71 chocolates. A red box has 112 chocolates. How many chocolates are there in total?
Solution
206 chocolates
71 chocolates
+ 112 chocolates
389 chocolates
Exercise 1
- School library has 218 Arabic books. It has 330 English books and 41 French books. How many books are in our library?
- Our farm has 132 pawpaw trees and 223 mango trees. Also, there are 14 orange trees. How many trees are in the farm?
- Neema has 212 sweets. Jimmy has 175 sweets. How many sweets do they have?
- Zabikha schools have 216 boys. There are also 233 girls and 23 teachers. How many people are there in the school?
- There are 476 tables in the first hall. In the second hall, there are 413 tables. How many tables are in the two halls?
- Uncle Ally has kites in the shop. There are 302 red kites and 80 white kites. Also, there are 416 blue kites are in the shop?
- A hall has 513 blue chairs. There are 323 white chairs. Also, there are 161 pink chairs. In total, how many chairs are in the hall?
Exercise 2
Answer the following questions.
- A game reserve has 123 zebra and 234 antelopes. Also, it has 124 buffaloes. How many animals are in the reserve?
- Musa’s shop has 222 dresses. It has 111 shirts and 333 shorts. How many clothes are in musa’s shop?
- In kitoi’s grocery, there are 200 oranges. There are 166 mangoes and 403 apples. How many fruits are in kitoi’s grocery?
- A florist has 422 roses and 445 jasmines. She also has 100 hibiscuses. How many flowers does the florist have?
- At Asia’s birthday party, her mother brought 310 cupcakes. She also brought 210 samosas and 310 buns. How many items did Asia’s mother bring?
- Lisa has 122 marbles and bushler has 163 marbles. Ryan has 101 marbles. How many marbles do they have in total?
- A coat has 101 red dots and 102 blue dots. There are also 103 yellow dots. How many dots are on the coat?
- A farm has 415 maize plants. It has 341 bean plants. It also has 233 banana trees. How many plants are in the farm?
- In the cage, there are 405 houseflies. There are also 222 butterflies and 301 dragonflies. How many insects are in the cage?
- Our village has 400 Lorries, 200 vans and 100 buses. How many vehicles are in the village?
ADDITION – ARITHMETIC
