expand it
what is the sum of
20 t 2
30t 3
55
what is the sum of
2 tens and 3 ones
plus 1ten and 4 ones
37
45
t 21
66
what the number 1 rule in this class
no talking when teacher is talking
2 plus 8
10
what is the sum of
10t5
20t2
37
what is the sum of
4 tens and 3 ones
plus
2 tens and 1 one
64
61
t 23
84
what is the number one rule in the school
always be safe and responsible
22 plus 12
32
what is the sum of
60t 4
10t3
77
what is the sum of
5tens and 5 ones
plus
2 tens and 3 ones
78
33
t 41
74
what is the number one rule at your house
be respectful
35 plus 41
76
what is the sum of
40t8
20t9
77
what is the sum of
4tens and 9 ones
plus
2tens and 4ones
73
55
t 28
83
what is the number one rule of algorithm
start at ones or backwards
37 plus 45
82
what is the sum of
40t6
30t9
85
what is the sum of
3tens and 8 ones
plus
3 tens and 3 ones
71
65
t 27
92
why do we start at the oees place whenaadding 2digit numbers
you may have to regroup
56 plus 26
92