How do we tackle addition in Y3 at West Byfleet Junior School?
1. Mental method, using partitioning:
52 + 36 = (50 + 30) + (2 + 6)
or
52 + 36 = (52+ 30) + 6
2. Introduction to vertical partitioning layout
3 / 0 / 0 / + / 7 / 0 / + / 84 / 0 / 0 / + / 8 / 0 / + / 7
7 / 0 / 0 / + / 1 / 5 / 0 / + / 1 / 5 / = / 8 / 6 / 5
3. Expanded Column Method, always add ones digit first
4 / 7+ / 7 / 6
1 / 3
1 / 1 / 0
1 / 2 / 3
4. Contracted Column Method, always add ones digit first
4 / 7 / 4 / 7+ / 7 / 6 / + / 7 / 6
1 / 3 / 1 / 2 / 3
1 / 1 / 0 / 1 / 1
1 / 2 / 3
ADDITION WORD PROBLEMS – Choice 1
1. If John has 58 toy cars and Tom has 70 toy cars, how many toy cars do they have altogether?
2. One farmer has 36 lambs and another has 87. How many lambs do the two farmers have together?
3. A grocer sold 27 bags of sweets on Monday, 35 bags on Tuesday and 18 bags on Wednesday. How many did they sell in those three days?
4. An orchard contains 25 apple trees, 19 pear trees and 8 plum trees. How many trees are in the orchard?
5. A man bought a pack of 150 balloons. Then he bought a pack of 35 streamers and 7 banners for a party. How many decorations did he buy altogether?
ADDITION WORD PROBLEMS – Choice 2
6. If John has 158 toy cars and Tom has 278 toy cars, how many toy cars do they have altogether?
7. One farmer has 336 lambs and another has 287. How many lambs do the two farmers have together?
8. A grocer sold 127 bags of sweets on Monday, 135 bags on Tuesday and 18 bags on Wednesday. How many did they sell in those three days?
9. An orchard contains 225 apple trees, 119 pear trees and 82 plum trees. How many trees are in the orchard?
10. A man bought a pack of 150 balloons. Then he bought a pack of 350 streamers and 57 banners for a party. How many decorations did he buy altogether?
ADDITION WORD PROBLEMS – Choice 3
11. If John has 158 toy cars, Tom has 278 toy cars, and Greg has 227 cars. How many toy cars do they have altogether?
12. One farmer has 336 lambs and another has 287. Then one farmer sells 38 of them, how many lambs are there altogether now?
13. A grocer sold 127 bags of sweets on Monday, 335 bags on Tuesday and 118 bags on Wednesday. How many did they sell in those three days?
He had 650 bags of sweets at the start of the week, how many does he have left?
14. An orchard contains 225 apple trees, 119 pear trees and 282 plum trees. How many trees are in the orchard?
Unfortunately, 145 trees die in the harsh winter. How many trees does he have left?
15. A man blew up 237 balloons. His friend Jay blew up 359 balloons and Robert blew up 416. 179 balloons deflated overnight, how many balloons were left for the party?