Place Value
1a. 3 tenths + 4 tenths = ______ tenths
7 tenths
2a. 0.4 + 0.7
1.1
What should you do with the decimal points when you add decimals vertically (one on top of the other)?
The decimal points should be lined up.
1b. 12 tenths + 9 tenths
= ____ tenths = _____ one(s) + _______ tenth(s)
21 tenths = 2 ones 1 tenth
2b. 2.04 + 0.07
2.11
What should you do if there is no digit to add in a place?
Example:
+ 0.3
0.54
Put a zero at the end of the decimal with fewer digits.
1c. 3 hundredths + 4 hundredths = _____ hundredths
7 hundredths
2c. 6.4 + 3.7
10.1
1e. 4 thousandths + 3 thousandths
= ______ thousandths
7 thousandths
1d. 27 hundredths + 7 hundredths
= ____ hundredths = ____ tenths + ____ hundredths
34 hundredths = 3 tenths 4 hundredths
2d. 56.04 + 3.07
59.11
1g
5 tenths (0.5) + 7 thousandths (0.007)
= 0.507 (507 thousandths)
1f. 39 thousandths + 5 thousandths
= ___ thousandths = ___ hundredths ___ thousandths
44 thousandths = 4 hundredths 4 thousandths
0.044 = 0.04 + 0.004
1h. 4 ones 4 tenths + 4 tenths = ______ tenths
4 ones 4 tenths (4.4) + 4 tenths (0.4)
= 4.4 + 0.4
= 4.8 (48 tenths)
1i. 8 thousandths + 6 ones 8 thousandths
= ______ thousandths
8 thousandths (0.008) + 6 ones 8 thousandths (6.008)
= 0.008 + 6.008
= 6.016 (6016 thousandths)