Math worksheet with decimal addition and subtraction problems forming a hidden dog image when answers are connected.

Final Answer:
The correct answers to circle are the ones where the equation is true. After checking all 63 lines:

- Line 1: 1 + 2 + (−5) = −2 → but says is −3 → ✘
- Line 2: 2 + (−1) + 8 = 9 → says is 7 → ✘
- Line 3: 3 + 4 + (−6) = 1 → says is −2 → ✘
- Line 4: 4 + 2 + (−6) = 0 → says is −4 → ✘
- Line 5: 5 + (−4) + (−2) = −1 → says is −6 → ✘
- Line 6: 6 + 8 + 4 = 18 → says is 12 → ✘
- Line 7: 7 + (−7) + 7 = 7 → says is 0 → ✘
- Line 8: 8 + 20 + (−7) = 21 → says is 13 → ✘
- Line 9: 9 + (−7) + 0 = 2 → says is −7 → ✘
- Line 10: 6 + 9 = 15 → says is 15 → ✔
- Line 11: 11 + (−8) + (−6) = −3 → says is −14 → ✘
- Line 12: −2 + 7 = 5 → says is 5 → ✔
- Line 13: 13 + (−7) + (−4) = 2 → says is −11 → ✘
- Line 14: 3.5 + 6.5 = 10 → says is 10 → ✔
- Line 15: −2 + 4 = 2 → says is 2 → ✔
- Line 16: 16 + (−2) + 6 = 20 → says is 4 → ✘
- Line 17: 5.5 + 2.5 = 8 → says is 8 → ✔
- Line 18: 4 + 4.5 + 4 = 12.5 → says is 8.5 → ✘
- Line 19: 8.5 + (−3) = 5.5 → says is 5.5 → ✔
- Line 20: 5 + 7.5 = 12.5 → says is 13 → ✘
- Line 21: 8.5 + 2 = 10.5 → says is 11 → ✘
- Line 22: −5 + 8 = 3 → says is 3 → ✔
- Line 23: 4.5 + 9.5 = 14 → says is 14 → ✔
- Line 24: −3 + (−5) = −8 → says is −8 → ✔
- Line 25: 4 + (−2) = 2 → says is 2.5 → ✘
- Line 26: 1 + 1 = 2 → says is 2 → ✔
- Line 27: 8 + (−8) = 0 → says is 0.5 → ✘
- Line 28: 6.5 + (−2) = 4.5 → says is 4.5 → ✔
- Line 29: −2 + (−2) = −4 → says is −4 → ✔
- Line 30: 1.5 + (−2) = −0.5 → says is −1 → ✘
- Line 31: 31 + (−3) + 6 = 34 → says is 3 → ✘
- Line 32: 32 + (−8.5) + 7 = 30.5 → says is −1.5 → ✘
- Line 33: 33 + (−6) + 3.5 = 30.5 → says is −2.5 → ✘
- Line 34: 34 + (−3) + (−9.5) = 21.5 → says is −13 → ✘
- Line 35: 35 + (−5) + (−4.5) = 25.5 → says is −9.5 → ✘
- Line 36: 36 + (−9.5) + (−6) = 20.5 → says is −16 → ✘
- Line 37: 37 + (−4.5) + (−6) = 26.5 → says is −11 → ✘
- Line 38: 38 + (−7) + (−4.5) = 26.5 → says is −12 → ✘
- Line 39: 39 + 0.5 + 3 = 42.5 → says is 3.5 → ✘
- Line 40: 40 + (−5) + 4 = 39 → says is −1 → ✘
- Line 41: 41 + (−4.5) + (−2) = 34.5 → says is −6.5 → ✘
- Line 42: 42 + (−7.5) + 2.5 = 37 → says is −5 → ✘
- Line 43: 43 + (−5.5) + 1 = 38.5 → says is −4.5 → ✘
- Line 44: 44 + 7 + (−9.5) = 41.5 → says is −2.5 → ✘
- Line 45: 45 + 2.5 + (−1.5) = 46 → says is 1 → ✘
- Line 46: 46 + 8.5 + 7.5 = 62 → says is 16 → ✘
- Line 47: 47 + (−13) + 3.5 = 37.5 → says is −9 → ✘
- Line 48: 48 + 9 + 7.5 = 64.5 → says is 16.5 → ✘
- Line 49: 49 + (−12) + 21 = 58 → says is 9 → ✘
- Line 50: 50 + 0.5 + 1 = 51.5 → says is 1.5 → ✘
- Line 51: 51 + (−3.5) + 10 = 57.5 → says is 6.5 → ✘
- Line 52: 52 + (−0.5) + 10 = 61.5 → says is 9.5 → ✘
- Line 53: 53 + (−0.5) + (−4.5) = 48 → says is −5 → ✘
- Line 54: 5.5 + (−0.5) = 5 → says is −1 → ✘
- Line 55: 15 + (−4) = 11 → says is 11 → ✔
- Line 56: −16 + 22 = 6 → says is 6 → ✔
- Line 57: −14 + 1.5 = −12.5 → says is −12 → ✘
- Line 58: 7.5 + 6 = 13.5 → says is 13.5 → ✔
- Line 59: 7.5 + 7 = 14.5 → says is 14.5 → ✔
- Line 60: −14.5 + 1.5 = −13 → says is −13 → ✔
- Line 61: 16 + (−0.5) = 15.5 → says is 15.5 → ✔
- Line 62: 8 + (−0.5) = 7.5 → says is 7.5 → ✔
- Line 63: −4.5 + (−3.5) = −8 → says is −8 → ✔

So the correct lines to circle are:
10, 12, 14, 15, 17, 19, 22, 23, 24, 26, 28, 29, 55, 56, 58, 59, 60, 61, 62, 63

That’s 20 correct equations.

But the instruction says “Circle each answer.” — meaning circle the *lines* where the statement is true.

Since the question only asks to identify which are correct (and the final output should be just the answer), and given typical format of such worksheets, the expected final answer is the list of line numbers that are correct.

However, the problem likely expects the student to physically circle those lines — but since we must give only the final answer, and it's a list of line numbers, we provide them clearly.

Final Answer:
10, 12, 14, 15, 17, 19, 22, 23, 24, 26, 28, 29, 55, 56, 58, 59, 60, 61, 62, 63