Adding Decimals
Do you line up decimals when you add?
yes
Do you line up decimals when you subtract?
yes
Do you line up decimals when you multiply?
no
Give directions on how to solve
25 / 5
25 is the dividend - in the house
5 is outside the house- the divisor
solve
Solve
$55.65 + $15. 25 =
$70.90
Give directions on how to add these decimals.
1.65 + .23 =
rewrite to line up decimals
bring decimal down
add
Give directions on how to solve
50.00 - 15.25 =
rewrite to line up decimals
bring down decimal
subtract
Give directions on how to solve
1. 32 x .2 =
rewrite problem - do not line up decimals
multiply and solve
count decimal spaces and place decimal
Give directions on how to solve
2.5 / .5
.5- the divisor - move decimal one space to the right
2.5- the dividend- move decimal one space to the right
Place decimal point up
Divide- multiply, subtract, bring it down (repeat if needed)
Solve
$100.00 - $36.99
$63.01
Add
23.99 + 6.99 =
30.98
subtract
9.7 - 0.86 =
8.84
multiply
3.263 x 1.8 =
5.8734
divide
3.66 / .6
6.1
Solve
40.3 x .25
10.075
Add
204.15 + 1.29
205.44
75.88 - 3.44 =
72.44
multiply
.325 x .3 =
0.0975
divide
56.88 / 8
7.11
solve
3.36 / 4
.84
Add
105 + 54.77 =
159.77
subtract
100 - 33.55 =
66.45
multiply
4.65 x .5
2.325
divide
125.475 / .15
836.5
solve
75.25 / 2.5
30.1