Scientific Notation | Addition & Subtraction | Adding & Subtracting Scientific Notation

If the given numbers have different exponent of 10, re-write the number with the larger exponent to get the same exponent. Once the exponents are the same, add or subtract the coefficients. If the sum or difference has a zero before the decimal point or has more than one digit before the decimal point, re-write the number to get a single non-zero digit before the decimal point.

[@user-kj1si8ls8w]

Thanks

[@magnumopus89]

I'm really sorry, it's been a while since I checked for comments. Since scientific notation requires only a single digit before the decimal point, 99.78 has to be written as 9.98 (round off the last digit) by moving the decimal point one place to the left and adding 1 to the exponent of 10.

[@sunnymjohn9411]

mam for the 2nd example in addition how uh changed 99.78 into 9.98?? Reply me mam

[@mafa.r4622]

I don't understand anything

[@sooryarajesh3848]

Mam it's one point one two not twelve and two point six five

[@sooryarajesh3848]

Not 65