Question

Va rogggg! dau 10 puncte + CORONAA!!​

Answer 1

Răspuns:

1. 81-19+57-39=

=62+57-39

=119-39

=80

25+41-13+28=

=66-13+28

=53+28

=81

7×6-3×6=

=42-18

=24

25-3×3-7=

=25-9-7

=16-7

=9

8×9-54+11=

=72-54+11

=18+11

=29

7+3×6-9=

=7+18-9

=25-9

=16

108+26-2×10=

=108+26-20

=134-20

=114

(25:5+7×2):1+230-(8×2×1+9)=

=(5+14):1+230-(16+9)

=29:1+230-7

=259-7

=252

(7×5-6×4)+(3×5-5×3)=

=(35-24)+(15-15)

=11+0

=11

4×(5-2+3)+3×(9-4+2)+4×(1+2+4)=

=4×(3+3)+3×(5+2)+4×(3+4)

=4×6+3×7+4×7

=24+35+28

=59+28

=87

(28+2+30):10+729-(9×2)=

=(30+30):10+729-18

=60:10+729-18

=6+729-18

=735-18

=717

Answer 2

Răspuns:

81-19+57-39=80

25+41-13+28=81

7×6-3×6=24

25-3×3-7=9

8×9-54+11=29

7+3×6-9=16

108+26-2×10=114

(25÷5+7×2)÷1+230-(8×2×1+9)=89

(7×5-6×4)+(3×5-5×3)=11

4×(5-2+3)+3×(9-4+2)+4×(1+2+4)=236

(28+2+30)÷10+729-(9×2)=717