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20 September, 03:00

3.)

Which of these expressions is NOT equivalent to

21 x 13?

a) (13 x 20) + (13 x 1)

b) (21 x 10) + (213)

c) (30 x 13) - (9 x 13)

d) (20 x 10) + (1 x 3)

+3
Answers (1)
  1. 20 September, 03:31
    0
    Let's find out ...

    Step-by-step explanation:

    21 x 13 = 273

    (13 x 20) + (13 x 1) =

    260 + 13 = 273

    So this one matches

    (21 x 10) + 213 =

    210 + 213 = 423

    Does not match

    (30 x 13) - (9 x 13) =

    390 - 117 = 273

    This one matches

    (20 x 10) + (1 x 3) =

    200 + 3 = 203

    Does not match
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