määrä

vähentyä

to decrease, to diminish

kakkonen

two (the digit 2; also second place, or a bus/route number 2)

laskuri

calculator (also counter)

toinen

second; other

viides

fifth

tarkistaa

to check, to verify

kolmekymmentä

thirty

vähennyslasku

subtraction (taking one number from another)