291 + c = 364

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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