test
1 a)263+58=321
b)345-178=167
c)26×18=468
d)2675:25=107
e)5^2+2^2-3^0-0^3-1^5=25+4-1-0-1=29-2=27
f)3×3^7×3^18:(3^6)^4=
=3^8×3^18:3^24=
=3^26:3^24=
=3^2= 9
g){6^2-[9^2-(14^2:4-5^2):2^2]:5^2}:11=
={36-[81-(196:4-25):4]:25}:11=
={36-[81-(49-25):4]:25}:11=
={36-[81-24:4]:25}:11=
={36-[81-6]:25}:11=
=(36-75:25):11=
=(36-3):11=
=33:11= 3
h) 33×42+33×63-33×5=33(42+63-5)=33(105-5)
=33×100=3300
i)34+35+....+93=
=93×94:2-33×34:2=
=93×46-33×17=
=4278-561=
=3717
2)a:5=3 rest x
x={0, 1,2,3,4}
a=3×5+x
a={15,16,17,18,19}
15+16+17+18+19=31+35+19=50+35=85
3)a+b=94
a:b=5 rest 4
a=5×b+4
5×b+4+b=94
6b=90
b=15
a=94-15
a=79
