Adding 3 or 4 digit digit numbers with decimals

The understanding tested is noted for each question, with a link to relevant support material. Always check the digits in the question have been copied correctly.

Mistakes with addition facts may be common.

1) 5,014 + 2,405 = 7,419

Calculating with zero.

2) 721 + 5,256 = 5,977

Aligning numbers, commutativity.

3) 368 + 487 = 855

Carrying.

4) 727 + 652 = 1,379

Carrying final digit.

5) 3,097 + 4,640 = 7,737

Carrying, calculating with zero.

6) 186 + 276 + 269 = 731

Adding 3 numbers, carrying.

7) 23.7 + 42.8 = 66.5

Carrying across the decimal point.

8) 4.83 + 3.86 = 8.69

Carrying across the decimal point.


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