Here's the question you clicked on:
cpertile111225
Solve by estimating 43.47 – 22.97 + 5.31
Jus do 43.50-23.00+5.30
or you can do 43+23+5; you see, if the number after the decimal is 5 or above the you round off the whole number, but if it's below 5 then the whole number would stay the same :)