Mark the number sentences that are correct. Group of answer choices

60 x 15 = (6 x 10) + (6 x 5)

99 x 11 = (1 x 9) + (1 x 90) + (10 x 9) + (10 x 90)

37 x 22 = (30 x 20) + (30 x 20) + (7 x 20) + (7 x 20)

18 x 42 = (10 x 40) + (10 x 2) + (8 x 40) + (8 x 2)

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