Adding 3 numbers
3+3+4=?
10
Which line is longer?
a) ___________
b) ______________
b
Draw 14 using base 10 blocks
1 stick, 4 blocks
12+33=?
45
9+2=?
11
1+7+2=?
10
Which line is longer?
a) ________________
b) ______________
a
draw 21 using base 10 blocks
2 sticks 1 block
51+40=?
91
17+2=?
19
2+2+0=?
4
Which line is longer?
a) ________
b) _____________
b
draw 36 using base 10 blocks
3 sticks, 6 blocks
26+13=?
39
9+5=?
14
5+1+2=?
8
Which line is longer?
a) _________________
b) ______________
a
draw 52 with base 10 blocks
23+45=?
68
14+2=?
16
3+4+2=?
9
Which line is longer?
a) ___________
b) ___________
they are the same
draw 94 with base 10 blocks
9 sticks, 4 ones
47+12=?
59
10+4=?
14