Question

8 Calculează:
a) 18 - (20-6):7-4-42;
b) [(2+2.3). 2-12] : 4 + 1;
c) 10 - {812: (32)4 + 2. [(22.3)15 : (229.315) + 1]}.
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Answer 1

a. 18-14:7-4 -4×2 =18-2-4-8=18-14=4

b.[(2+6)×2-12]:4+1=(16-12):4+1= 4:4+1=1+1=2

c. 10×{3⁸:3⁸+2×[(2³⁰×3¹⁵): (2²⁹×3¹⁵)+1]}=10×[1+2×(2+1)]=10×(1+6)=10×7=70