Question

X4. Calculează
121 + (2x 5 x 9) =
326 + (4 x 2 x 7) =
518 + (3 x 3 x 9) =
643 + (3 x 2 x 10) -
731 - (2 x 4 x 9) =
215 - (1 x 0 x 8) =
331 - (3 x 2 x 7)
147 - (6 x 1 x 6) =​

Answer 1

121 + 90 = 211

326 + 56 = 382

518 + 81 = 599

643 + 60 = 703

731 - 72 = 659

215 - 0 = 215

331 - 42 = 289

147 - 36 = 111