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Ad
din
g d
ecima
ls with
in 1
1
Wo
rk ou
t the a
dd
ition
s.
Use th
e nu
mb
er lines to
help
yo
u.
a) 0.3 + 0.2 =
00.1
0.20.3
0.40.5
0.60.7
0.80.9
1
b) 0.1 + 0.4 =
00.1
0.20.3
0.40.5
0.60.7
0.80.9
1
c) 0.2 + 0.1 + 0.2 =
00.1
0.20.3
0.40.5
0.60.7
0.80.9
1
Wh
at d
o y
ou
no
tice ab
ou
t yo
ur a
nsw
ers?
2
Co
mp
lete the p
art-w
ho
le mo
dels.
a)
c)
b)
d
)
3
Co
mp
lete the a
dd
ition
s.
Use th
e pla
ce valu
e cha
rts to h
elp y
ou
.
a) 0.42 + 0.3 =
b) 0.28 + 0.32 =
© W
hite R
ose M
ath
s 2020
0.10.3
0.5
0.4
0.70.2
0.050.005
0.5
On
esTen
ths
Hu
nd
redth
s
On
esTen
ths
Hu
nd
redth
s
04
02
+0
03
© W
hite R
ose M
ath
s 2020
c) 0.28 + 0.36 =
4
Use th
e colu
mn
meth
od
to w
ork o
ut th
e ad
ditio
ns.
a)
d)
b)
e)
c)
f)
5
Jack h
as set u
p a
colu
mn
ad
ditio
n
to w
ork o
ut 0.19 + 0.07
Wh
at m
istake h
as Ja
ck ma
de?
6
Ad
d to
geth
er 7 hu
nd
redth
s an
d 34 h
un
dred
ths.
Give y
ou
r an
swer a
s a d
ecima
l.
7 hu
nd
redth
s an
d 34 h
un
dred
ths =
7
Eva d
rinks a
qu
arter o
f a litre o
f wa
ter.
Mo
drin
ks 0.3 litres of w
ater.
Wh
itney
drin
ks a ten
th o
f a litre m
ore w
ater th
an
Mo
.
Ho
w m
uch
wa
ter do
Eva, M
o a
nd
Wh
itney
drin
k alto
geth
er?
04
2
+0
3
04
2
+0
03
3
00
4
+0
33
04
36
+0
17
07
51
+0
09
01
9
+0
7
On
esTen
ths
Hu
nd
redth
s
Wa
ter
