Laske vaiheittain.

a. 15 – (9 – 4) · 2
= – ·
= –
=

b. (5 · 9) – 14 + (5 + 9)
= – +
=

c. (38 + 14) + 7 · 3
= + ·
= +
=

d. 27 : 3 + 9 · 2
= +
=

e. 4 · 5 : 2 – (13 – 9)
= · : –
= : –
= –
=

f. (21 · 2) – (6 · 6)
= –
=