Let’s solve each equation one by one. We’re looking for the missing number that makes each addition true.
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First set (top left):
1.
1 + ___ + 500 = 531
Add what we know:
1 + 500 = 501
Now, 531 - 501 =
30
✔ So, missing number is
30
2.
___ + 40 + 300 = 341
Add known numbers:
40 + 300 = 340
341 - 340 =
1
✔ Missing number is
1
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Second set (middle left):
3.
5 + 60 + ___ = 765
Add known:
5 + 60 = 65
765 - 65 =
700
✔ Missing number is
700
4.
8 + 20 + ___ = 928
Add known:
8 + 20 = 28
928 - 28 =
900
✔ Missing number is
900
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Third set (bottom right):
5.
2 + ___ + 100 = 192
Add known:
2 + 100 = 102
192 - 102 =
90
✔ Missing number is
90
6.
6 + ___ + 200 = 276
Add known:
6 + 200 = 206
276 - 206 =
70
✔ Missing number is
70
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Fourth set (middle right):
7.
9 + 90 + ___ = 899
Add known:
9 + 90 = 99
899 - 99 =
800
✔ Missing number is
800
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All answers checked and correct!
Final Answer:
30, 1, 700, 900, 90, 70, 800
Parent Tip: Review the logic above to help your child master the concept of place value worksheet 3 digit.
