Adding with decimal fractions.

I am learning to add with 1 decimal place fractions.

Questions like 3.7 + 2 .5 = ?

Craig has 1 whole chocolate bar and 4 tenths of a chocolate bar. In another room he has 2 chocolate bars and 8 tenths.

Step 1: Imagine the two amounts.

chocolate

chocolate

chocolate

Step 2: Join the tenths together.

You can see that there are now 4 whole chocolate bars and 2 tenths.

1.4 + 2.8 = 4.2

Dan has 3 whole chocolate bar and 9 tenths in one room and 6 tenths of a chocolate bar in another room.

Step 1: Imagine the two amounts.

chocolate

Step 2: Join the tenths together.

You can see that there are now 4 whole chocolate bars and 5 tenths.

3.9 + 0.6 = 4.5 chocolate

chocolate

Now try these questions on your own. You may need some blocks to help you work these out.

Need some more practise? Try Teacher Tools Addition and Subtraction Book or Fractions, Decimals and Percentages Book Numeracy resources

1) 3.7 + 2.6 = ?

2) 4.5 + 1.7 = ?

3) 0.6 + 0.8 = ?

4) 3.5 + 3.9 = ?

5) 2.8 +1.9 = ?

Click again when you have completed each question and the answer will be displayed.

6.3

6.2

1.4

7.4

4.7