Postupně vypočítej zadané příklady.

135 + 40 =	298 – 60 =	309 – 30 =	373 + 70 =
727 + 50 =	632 + 80 =	900 – 90 =	251 + 20 =
542 – 20 =	910 – 10 =	636 – 70 =	483 + 90 =
427 – 70 =	453 + 90 =	208 – 40 =	261 – 90 =
398 + 50 =	584 + 60 =	405 – 80 =	618 – 30 =