Planet 21 Count along a number line to subtract
18 - 4=
17 - 2=
18 - 6=
20 - 8=
Planet 22 Addition bonds to 20
20 + 0 =
2+
1+
+15=
=
20
=
+3=
20
+8=
20 = 4 +
20 =
+5=
20
+13=
=
20
4 + 16 =
+7 =
20 =
20
+9
15+
=
20
13 + 7
20
6+
20
20
20 =
+ 10
+11=
20
Planet 23 Subtraction bonds to 20
20 –
20 - 3 =
–4=
16
20 – 5 =
20 –
=
–2=
4
=
2=
5
-18
20 –
=
8
20 –
=
3
= 20 - 7
18
20 –
=
19
20 – 6 =
20 –
=
16
20 –
=
4
20 –
=
14
20 –
=
3
20 –
=
3
20 –
=
12
20 - 10=
5 = 20 20 – 9 =
20 –
=
11
Planet 24 Addition and subtraction bonds to 20
6+
=
20
=
20 - 3
+4 =
20
+ 13 =
20 –
=
20
15
16 + 4 =
20 – 8 =
20 –
=
12
17 + 3 =
20 –
=
16
20 – 7 =
20 – 2
+ 15 =
13 +
20
=
20 - 8
=
20
12 = 20 20 – 11 =
=
+ 11 =
20 –
=
20
13
Planet 24 continued…
– 13=
7
= 19 + 1
+0 =
20
2 = 2019 +
=
=
3 +
=
14 =
18 + 2
20 –
20
6
=
=
=
7 = 20 -
20
20 – 20 =
20 – 16
=
4+
=
20
=
8
– 12
-6
4
20 – 19 =
2+
20 – 13 =
20 -
0 + 20 =
11 +
=
20
Planet 25 Number bonds to 100
100 – 20 =
90 + 10 =
+100 = 100
100 – 80 =
=
= 80 +20 100 –
– 70 =
+ 10= 100
100 = 30 +
+ 60 =
100 =
+ 30 =
100
100 –
50 + 50 =
= 60+40
30
60
100 – 50 =
+50 100 –
100
=
40
=
70
100 – 60 =
100 – 100 =
– 50 =
50