Tenths 1
This 12-question quiz is a gentle start to adding decimals, working only with numbers carried to the tenths place.
Most items ask you to add two values, like 0.7 + 0.2 = ? and 0.8 + 0.7 = ?, and a few flip into true or false statements for you to check.
The one habit that makes all of this easier is lining up the decimal points before you add, so the tenths sit right under the tenths.
Some sums also cross over into whole numbers, which is a nice early reminder to watch your carrying.
Recommended level: beginner.