Question

7. Te ştiu perseverent. Dovedeşte efectuând calculele:
a) 456 + (200 – 172) = 24
b) 256-69 +56-(317-209) =
c) 1839-(675-383 + 145) =
d) 1200 - [1300 - (240+145)] + 145 =
e) 100 - [151 - (34+95) +49] +9=
f) 61 - {100 - [300 - (38+195)]}+199=
g) 70-[1700 - (581+1024) - 59] + 29 =
h) 16521-9724 +145-(835-789) =​

Answer 1

Răspuns:

a)456+(200-172)=

456+28=484

b)256-69+56-(317-209)=

187+56-108=

243-108=135

c)1838-(675-383+145)=

1838-(292+145)=

1838-437=1401

d)1200-[1300-(240+145)]+145=

1200-(1300-385)+145

1200-915+145=

285+145=430