1. Find the sum.2 tens, 4 ones___ + ___ = ___ A. 30 + 5 = 35 B. 20 + 2 = 22 C. 20 + 5 = 25 D. 20 + 4 = 24 Hint 2. Find the sum.4 tens, 1 one___ + ___ = ___ A. 30 + 1 = 31 B. 40 + 5 = 45 C. 40 + 1 = 41 D. 50 + 1 = 51 Hint 3. Estimate. Compare to the group of 10. A. about 80 B. about 40 C. about 60 D. about 20 Hint 4. Estimate. Compare to the group of 10. A. about 20 B. about 40 C. about 80 D. about 50 Hint 5. Compare. Use >, <, or =.91 ___ 19 A. > B. none C. < D. = Hint 6. How many triangles should come next in the pattern? A. 1 B. 3 C. 5 D. 4 Hint 7. What number comes next in the pattern?10, 20, 30, ___ A. 40 B. 50 C. 35 D. 25 Hint 8. What number comes next in the pattern?10, 12, 14, ___ A. 16 B. 15 C. 17 D. 13 Hint 9. What number comes next in the pattern?12, 15, 18, ___ A. 21 B. 17 C. 19 D. 25 Hint 10. Find the sum.1 + 3 = ____ A. 5 B. 3 C. 6 D. 4 Hint 11. Find 1 + 1. A. 1 B. 3 C. 2 D. 0 Hint 12. Find the sum.3 + 3 = ___ A. 5 B. 9 C. 6 D. 7 Hint 13. Find the sums.9 + 9 = ___9 + 10 = ___ A. 19, 20 B. 17, 18 C. 18, 19 D. 18, 16 Hint 14. Find the sum. A. 7 B. 5 C. 6 D. 8 Hint 15. Find 4 − 1. A. 3 B. 2 C. 0 D. 1 Hint 16. Find 3 − 2. A. 2 B. 5 C. 0 D. 1 Hint 17. Subtract. Use the number line.6 − 2 = ___ A. 4 B. 5 C. 3 D. 8 Hint 18. Find the difference.1 − 1 = ___1 − 0 = ___ A. 0, 0 B. 0, 1 C. 1, 1 D. 1, 0 Hint 19. Find the missing number.3 + ___ = 66 − 3 = ___ A. 1 B. 2 C. 3 D. 4 Hint 20. Find the missing number.6 + ___ = 1414 − ___ = 6 A. 6 B. 8 C. 9 D. 7 Hint