The task involves solving two-digit addition problems using base ten blocks. Base ten blocks are visual tools that help represent numbers in a concrete way, with rods representing tens and cubes representing ones.
Step-by-Step Solution:
####
First Row:
1.
First Problem:
- Left side: 2 rods (20) and 4 cubes (4) →
24
- Right side: 3 rods (30) and 5 cubes (5) →
35
- Sum: \( 24 + 35 = 59 \)
2.
Second Problem:
- Left side: 1 rod (10) and 7 cubes (7) →
17
- Right side: 4 rods (40) and 6 cubes (6) →
46
- Sum: \( 17 + 46 = 63 \)
####
Second Row:
3.
Third Problem:
- Left side: 3 rods (30) and 2 cubes (2) →
32
- Right side: 2 rods (20) and 8 cubes (8) →
28
- Sum: \( 32 + 28 = 60 \)
4.
Fourth Problem:
- Left side: 4 rods (40) and 3 cubes (3) →
43
- Right side: 1 rod (10) and 9 cubes (9) →
19
- Sum: \( 43 + 19 = 62 \)
####
Third Row:
5.
Fifth Problem:
- Left side: 5 rods (50) and 1 cube (1) →
51
- Right side: 2 rods (20) and 7 cubes (7) →
27
- Sum: \( 51 + 27 = 78 \)
6.
Sixth Problem:
- Left side: 3 rods (30) and 6 cubes (6) →
36
- Right side: 4 rods (40) and 4 cubes (4) →
44
- Sum: \( 36 + 44 = 80 \)
####
Fourth Row:
7.
Seventh Problem:
- Left side: 2 rods (20) and 9 cubes (9) →
29
- Right side: 1 rod (10) and 5 cubes (5) →
15
- Sum: \( 29 + 15 = 44 \)
8.
Eighth Problem:
- Left side: 4 rods (40) and 3 cubes (3) →
43
- Right side: 3 rods (30) and 7 cubes (7) →
37
- Sum: \( 43 + 37 = 80 \)
Final Answers:
1. \( 24 + 35 = 59 \)
2. \( 17 + 46 = 63 \)
3. \( 32 + 28 = 60 \)
4. \( 43 + 19 = 62 \)
5. \( 51 + 27 = 78 \)
6. \( 36 + 44 = 80 \)
7. \( 29 + 15 = 44 \)
8. \( 43 + 37 = 80 \)
Boxed Final Answer:
\[
\boxed{59, 63, 60, 62, 78, 80, 44, 80}
\]
Parent Tip: Review the logic above to help your child master the concept of addition worksheet using base ten blocks.