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
add
bring decimal down
Give directions on how to solve
50.00 - 15.25 =
rewrite to line up decimals
subtract
bring down decimal
Give directions on how to solve
1. 32 x .2 =
rewrite problem - do not line up decimals
multiply and solve
count decimal spaces
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
move decimal point up and solve
Solve
$100.00 - $36.99
$63.01
Add
23.99 + 6.99 =
30.98
subtract
3.50 - 1.20 =
2.30
what is 300-1000
700
divide
3.6 / .6
6
Solve
40.3 x .25
10.075
Add
204.15 + 1.29
205.44
75.88 - 3.44 =
72.44
multiply
10.5 x .02 =
0.21
divide
5.68 / 8
.71
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
12.5 / .05
25
solve
75.25 / 2.5
30.1