Step 1: To find the unknown addend, rearrange the addition equation to a subtraction equation: Unknown = 19,005 - 3,006 Step 2: Perform the subtraction: 19,005 - 3,006 = 15,999

Year 6 Arithmetic: Find the Unknown in ? + 3,006 = 19,005

$Math Problem$

Mathematics Year 6 (Primary School)

Question Content

? + 3,006 = 19,005

Correct Answer

15999

Detailed Solution Steps

1
Step 1: To find the unknown addend, rearrange the addition equation to a subtraction equation: Unknown = 19,005 - 3,006
2
Step 2: Perform the subtraction: 19,005 - 3,006 = 15,999

Knowledge Points Involved

Inverse Operations (Addition and Subtraction)

Subtraction is the inverse of addition. If a + b = c, then c - b = a and c - a = b. This is used to solve for unknown values in addition equations, such as finding a missing quantity when the total and one part are known.

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