Seashell Collectors: Adding Tens and Ones
0 / 12Seashell Collectors: Adding Tens and Ones
Add within 100 by putting tens with tens and ones with ones.
Shell Buckets
Each rod is 10 shells. Each cube is 1 shell. Add tens with tens and ones with ones.
1.
Noah has these shells in his bucket. Then he finds 4 more shells.
23 + 4 = shells
2.
Lena has these shells. Her dad gives her 2 more bags with 10 shells in each bag.
35 + 20 = shells
3.
Add 43 + 25 by place.
4 tens + 2 tens = tens
3 ones + 5 ones = ones
43 + 25 =
4.
Kai has these shells. He finds 5 more shells.
8 ones + 5 ones = ones
13 ones is 1 ten and ones.
28 + 5 = shells
5.
Count on by tens to add 46 + 30.
46, , ,
46 + 30 =
6.
Maria finds 52 white shells and 7 pink shells.
Maria finds shells in all.
7.
Sam finds 6 shells. His sister finds 81 shells. How many shells do they find in all?
6 + 81 = shells
Tide Pool Check
Choose, match, circle, sort, and explain.
8.
Ava has 34 shells. Her brother gives her 25 more. How many shells does Ava have now?
9.
Match each problem to its sum.
10.
Circle every problem that makes 80.
11.
Add the ones in each problem. Do they make a new ten?
12.
Jamal says 47 + 20 = 49. Is he right? Explain how you know.