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Find the Missing Addend
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Find the Missing Addend
A makerspace is getting ready for a busy day. Find each missing addend—the number that completes the addition equation. You can use subtraction, counting on, or a number line.
Makerspace Supply Challenge
Amara, Lucy, and Ethan are organizing supplies. Write the missing addend in each equation.
1.The makerspace has 67 craft sticks altogether. There are 30 in one bin. Complete: 30 + = 67.
2.Lucy counted 25 markers in a tray. How many more markers are needed to make 67? Complete: ___ + 25 = 67.
3.Choose the missing addend: 45 + ___ = 67.
- 12
- 22
- 32
- 112
4.Ethan put 13 cardboard tubes in a box. The box holds 67 tubes when full. How many more tubes will fill it? Complete: 13 + ___ = 67.
5.Use the number line to count on from 18 to 67. How many jumps of 10 and then how many ones make the missing addend in 18 + ___ = 67?
Solve, Check, and Explain
Find each missing addend. For the last problem, explain how you know your answer is correct.
6.Complete the equation: + 39 = 67.
7.A tray needs 67 beads for a design. It already has 52 beads. How many more beads are needed? Write an equation and solve it.
8.True or false: The missing addend in 18 + ___ = 67 is 59. Check by adding your number to 18.
TrueFalse
9.Amara says the missing addend in ___ + 46 = 67 is 21. Show a check that proves whether she is correct.
10.The team has 35 blue blocks and needs 67 blocks altogether. Find the missing addend, then describe one way to check your answer.
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