Step 1: Calculate the sum for each problem.
- For the first problem:
12+7=19
- For the second problem:
13+10=23
- For the third problem:
19+21=40
- For the fourth problem:
26+9=35
- For the fifth problem:
5+18=23
- For the sixth problem:
45+33=78
- For the seventh problem:
29+15=44
Step 2: Present the final answers.
The completed additions are:
12+7=19
13+10=23
19+21=40
26+9=35
5+18=23
45+33=78
29+15=44
That's 2 down. 3 left today — send the next one.