Question

adding & subtracting decimals
a. \\(\

$$\begin{array}{r}.56\\\\ -.12\\\\ \\hline \\end{array}$$

\\) b. \\(\

$$\begin{array}{r}.99\\\\ -.23\\\\ \\hline \\end{array}$$

\\) c. \\(\

$$\begin{array}{r}5.10\\\\ -2.13\\\\ \\hline \\end{array}$$

\\) d. \\(\

$$\begin{array}{r}2.8\\\\ +2.2\\\\ \\hline \\end{array}$$

\\)
e. \\(\

$$\begin{array}{r}95.0\\\\ -2.1\\\\ \\hline \\end{array}$$

\\) f. \\(\

$$\begin{array}{r}5.2\\\\ -2.5\\\\ \\hline \\end{array}$$

\\) g. \\(\

$$\begin{array}{r}36.0\\\\ +4.4\\\\ \\hline \\end{array}$$

\\) h. \\(\

$$\begin{array}{r}2.5\\\\ -1.5\\\\ \\hline \\end{array}$$

\\)
i. \\(\

$$\begin{array}{r}64.2\\\\ +3.4\\\\ \\hline \\end{array}$$

\\) j. \\(\

$$\begin{array}{r}9.20\\\\ +9.18\\\\ \\hline \\end{array}$$

\\) k. \\(\

$$\begin{array}{r}1.54\\\\ +2.30\\\\ \\hline \\end{array}$$

\\) l. \\(\

$$\begin{array}{r}5.92\\\\ +6.38\\\\ \\hline \\end{array}$$

\\)
m. \\(\

$$\begin{array}{r}3.31\\\\ -2.13\\\\ \\hline \\end{array}$$

\\) n. \\(\

$$\begin{array}{r}3.37\\\\ -1.27\\\\ \\hline \\end{array}$$

\\) o. \\(\

$$\begin{array}{r}4.52\\\\ -.81\\\\ \\hline \\end{array}$$

\\) p. \\(\

$$\begin{array}{r}3.14\\\\ +6.98\\\\ \\hline \\end{array}$$

\\)

Explanation:

Step1: Subtract hundredths place

$0.55 - 0.12 = 0.43$

Step2: Subtract hundredths place

$0.99 - 0.23 = 0.76$

Step3: Align decimals, subtract

$5.10 - 2.13 = 2.97$

Step4: Align decimals, add

$2.8 + 2.2 = 5.0$

Step5: Align decimals, subtract

$95.0 - 2.1 = 92.9$

Step6: Align decimals, subtract

$5.2 - 2.5 = 2.7$

Step7: Align decimals, add

$36.0 + 4.4 = 40.4$

Step8: Align decimals, subtract

$2.5 - 1.5 = 1.0$

Step9: Align decimals, add

$64.2 + 3.4 = 67.6$

Step10: Align decimals, add

$9.20 + 9.18 = 18.38$

Step11: Align decimals, add

$1.54 + 2.30 = 3.84$

Step12: Align decimals, add

$5.92 + 6.35 = 12.27$

Step13: Subtract hundredths place

$3.31 - 2.13 = 1.18$

Step14: Subtract hundredths place

$3.37 - 1.27 = 2.10$

Step15: Align decimals, subtract

$4.52 - 0.81 = 3.71$

Step16: Align decimals, add

$3.14 + 6.98 = 10.12$

Answer:

a. $0.43$
b. $0.76$
c. $2.97$
d. $5.0$
e. $92.9$
f. $2.7$
g. $40.4$
h. $1.0$
i. $67.6$
j. $18.38$
k. $3.84$
l. $12.27$
m. $1.18$
n. $2.10$
o. $3.71$
p. $10.12$