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04Numbers in Disguise Unit

Objective: Practice addition and subtraction by filling in the blanks . Have the students use the number cards from
1~8 once in each problem to make addition or
Here are number cards from 1 to 8. subtraction sentences that result in the given
sums or differences.
12345678

Different subtraction and addition sentences can be made using 8 number
cards once. Write the missing numbers in the blanks.

Sample Answers

8765 8764

+1 2 3 4 +2 3 5 1
9,9 9 9 1 1,1 1 5

8642 8743

7531 6521

1,1 1 1 2,2 2 2

4. Numbers in Disguise 31

The Least Difference

In order to make the least difference, the two numbers must be as close as possible. Solve using the
following method.

Step 2. The digits that are left after step 1 are 4 and 5. A 5, E 4.
So, 5,123 4,876 247.

A123 5123
E876 4876

247

4A Unit 04 051
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