Question

Tính bằng cách thuận tiện nhất:

14 x 230 + 7 x 540

Answer 1

75460

Answer 2

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Answer 3

14 x 230 + 7 x 540 = 3220 + 3780

                            = (300+220)+(300+780)

                            = (3000+3000)+(220+780)

                            = 6000+1000= 7000