1000 - a = 41
Fill in here
Finding the unknown term to the sum is calculated by performing the inverse. The known term is subtracted from the sum.
x + 20 = 50
x = 50 - 20
x = 30
Finding the unknown term to the difference is by the sum between the subtractor and the result.
y - 15 = 40
y = 40 + 15
y = 55
Finding the unknown term at multiplication is by dividing the product by the known factor.
z × 4 = 32
z = 32 ÷ 4
z = 8
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