Question

evaluate 21-(20-(12-(9-4-3)|| b. 60+(12-10-6+5)*7 c. (27+(15-11-5)+13-(5)​

Answer 1

Answer:

${\gray{a)21-(20-(12-(9-4-3)}}$

$\purple{ = > 21 - (20 - (12 - 9 + 4 + 3)}$

$\purple{ = > 21 - (20 - 12 + 9 - 4 - 3)}$

$\purple{ = > 21 - (20 - 12 + 9 - 4 - 3)}$

$\purple{ = > 21 - 20 + 12 - 9 + 4 + 3}$

$\purple {= > 33 - 29 + 7}$

$\purple{ = > 40 - 29}$

$\large{\purple{ = > 11}}$

${\gray{b) \: 60+(12-10-6+5) \times 7}}$

$\pink{ = > 60 +(17 - 10 - 6) \times 7}$

$\pink{ = > 60 + (17 - 16) \times 7}$

$\pink{ = > 60 + 1 \times 7}$

$\pink{ = > 60 + 7}$

$\large{\pink{ = > 67}}$

$\gray{c) \: (27+(15-11-5)+13-(5)}$

$\blue{ = > (27 + (15 - 11 - 5) + 13 - 5}$

$\blue{ = > (27 + (4 - 5) + 13 - 5}$

$\blue{ = > 27 + ( - 1) + 13 - 5}$

$\blue{ = > 27 - 1 + 5}$

$\blue{ = > 26 + 5}$

$\large{\blue{ = > 31}}$

Answer 2

Answer:

{\gray{a)21-(20-(12-(9-4-3)}}a)21−(20−(12−(9−4−3)

\purple{ = > 21 - (20 - (12 - 9 + 4 + 3)}=>21−(20−(12−9+4+3)

\purple{ = > 21 - (20 - 12 + 9 - 4 - 3)}=>21−(20−12+9−4−3)

\purple{ = > 21 - (20 - 12 + 9 - 4 - 3)}=>21−(20−12+9−4−3)

\purple{ = > 21 - 20 + 12 - 9 + 4 + 3}=>21−20+12−9+4+3

\purple {= > 33 - 29 + 7}=>33−29+7

\purple{ = > 40 - 29}=>40−29

\large{\purple{ = > 11}}=>11

{\gray{b) \: 60+(12-10-6+5) \times 7}}b)60+(12−10−6+5)×7

\pink{ = > 60 +(17 - 10 - 6) \times 7}=>60+(17−10−6)×7

\pink{ = > 60 + (17 - 16) \times 7}=>60+(17−16)×7

\pink{ = > 60 + 1 \times 7}=>60+1×7

\pink{ = > 60 + 7}=>60+7

\large{\pink{ = > 67}}=>67

\gray{c) \: (27+(15-11-5)+13-(5)}c)(27+(15−11−5)+13−(5)

\blue{ = > (27 + (15 - 11 - 5) + 13 - 5}=>(27+(15−11−5)+13−5

\blue{ = > (27 + (4 - 5) + 13 - 5}=>(27+(4−5)+13−5

\blue{ = > 27 + ( - 1) + 13 - 5}=>27+(−1)+13−5

\blue{ = > 27 - 1 + 5}=>27−1+5

\blue{ = > 26 + 5}=>26+5

\large{\blue{ = > 31}}=>31