WALT add mentally the ones and tens separately when appropriate.
54+65= 5+4=9
50+60=110
=119
72+53=
2+3=5
70+50=120
=125
33+94=
3+4=5
30+90=120
=125
80+16=
0+6=6
80+10=90
=96
27+31=
7+1=8
20+30=50
=58
64+84=
4+4=8
60+80=140
=148
46+72=
6+2=8
40+70=110
=118
71+44=
1+4=5
70+40=110
=115
15+33=
5+3=8
10+30=40
=48
83+81=
3+1=4
80+80=160
=164
62+27=
2+7=9
60+20=80
=89
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