Răspuns:
a. 3.1+2×1.11= 3.1+2.22=5.32
b. 23.1:10-1.1=2.31-1.1=1.21
c. 32.9-8×3.9= 32.9-31.2=1.7
d. 0.98-1:2=0.98-0.5=0.48
e. 0.0007×1000-0.4:2=0.7-0.2=0.5
f. 2.5×0.5:25=1.25:25=0.05
g. (1-0.9):2×100=0.1:2×100=0.05×100=5
h. (1.296:3.6+0.64):10=(0.36+0.64):10=1:10=0.1
i 5.85:15-0.001=0.39-0.001=0.389
j. [(45-2.23×10+0.3):23+9]:100=[(45-22.3+0.3):23+9]:100=[(22.7+0.3):23+9]:100=[23:23+9]:100=10:100=0.1
l. 100-0.5×[(13.11:2.3+0.3):100+0.04]×100=100-0.5×[(5.7+0.3):100+0.04]×100=100-0.5×[10:100+0.04]×100=100-0.5×0.14×100=100-0.7×100=100-70=30
m. {[(12-0.99:3)×100+33]÷100+0.5}:125={[(12-0.33)×100+33]÷100+0.5}:125={[1167+33]÷100+0.5}:125={1200:100+0.5}:125=12.5:125=0.1
k. [0.5+2×(1.12+12.1+121)]+268+0.06=[0.5+2×134.22]+268+0.06=[0.5+268.44]+268+0.06=268.94+268+0.06=269+268=537
n. {0.25+5×[33-2×(34.5+5.5):80]}×100-25= {0.25+5×[33-2×40:80]}×100-25={0.25+5×[33-80:80]}×100-25={0.25+5×32}×100-25={0.25+160}×100-25=160.25×100-25=16025-25=16000
