Question

16./calculează respectând ordinea efectuării operaţiilor. a) 7.8+(87-79): 4 = b) 24.5. (25:5:5-1) + 25 = c) 3.2:6. [20 + (54:9:2-1)] - 20 = d) [(5.4+3 •4):(9.8-8•8)] : 4 =​

Answer 1

Răspuns: a) 58; b) 25; c) 2; d) 1;

Explicație pas cu pas:

a) 7x8+(87-79):4=56+8:4=56+2=58

b) 24x5x(25:5:5-1)+25=100x(5:5-1)+25=100x(1-1)+25=100x0+25=0+25=25

c) 3x2:6x[20+(54:9:2-1)]-20=6:6x[20+(6:2-1)]-20=1x[20+(3-1)]-20=1x(20+2)- 20=1x22-20=22-20=2

d) [(5x4+3x4):(9x8-8x8)]:4=​[(20+12):(72-64)]:4=(32:8):4=4:4=1