Page 40 - PlayFacto_P4
P. 40
Addition table
The addition table shows the sum of two numbers where they intersect
vertically and horizontally.
+123
1234
2345
2+1
3456
3+3
Example 1 Find the sum. 3 ⑵+2
⑴ + 1 2 24
12 3
4
⑶ + 2 3
4 ⑷+123
58 35
47
4. Speed addition 37
The addition table shows the sum of two numbers where they intersect
vertically and horizontally.
+123
1234
2345
2+1
3456
3+3
Example 1 Find the sum. 3 ⑵+2
⑴ + 1 2 24
12 3
4
⑶ + 2 3
4 ⑷+123
58 35
47
4. Speed addition 37
