15X15=?

25X25=?

35X35=?

45X45=?

55x55=?

65X65=?

...

95x95=?

who can tell me how to do these multiplications without a calculator in 30 seconds?

tell me the details

Write an expression for the difference of 6 and k.

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Which inequality is equivalent to 8 < 3x - 4 (2x - 5) ?

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Write an equation that shows an estimate of each answer, 495 + 812