Question

calculate (2.3×10^-3 -4.2×10^-4)

Answer 1

HEY DEAR,

HERE IS YOUR ANSWER....

(1.)  TO SOLVE THIS FIRSTLY TAKE THE POWERS OF 10 SAME IN BOTH  NUMBERS ...

      (2.3 * {10^(-3)} - 0.42 *{10^(-4)})

(2.) TAKE POWER OF 10 COMMON AND SOLVE REMAINING NO.

      10^(-3){2.3 - 0.42}

(3.) SOLV THE BRACKET ...

  10^(-3) {1.88}

SO, HERE IS YOUR ANSWER..

              => {1.88 * 10^(-3)}

HOPE IT HELPS YOU..

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THANKS ..

,ARK ME BRAINLIEST PLZ IF IT REALLY HELPS YOU  :)

Answer 2

Please see the attachment