Question

Verificati egalitatile:a) 8×7-49÷7=7×7 ; 60-3×8=6×6; 25÷5+8×6=60-14÷2 ; 90-56÷7=6×7+5×8. b) 9×8=90-24÷3-5×2; 7×5+8×6=26+56 ; 90÷10+32÷4=22-25÷5; 3×7+3×6=40-6÷6.

Answer 1

a)
8×7-49÷7=7×7
56-7=49
49=49 (adevărat)

60-3×8=6×6
60-24=36
36=36 (adevarat)

25÷5+8×6=60-14÷2
5+48=60-7
53=53 (adevărat)

90-56÷7=6×7+5×8
90-8=42+40
82=82 (adevarat)

b)
9×8=90-24÷3-5×2
72=90-8-10
72=82-10
72=72 (adevărat)

7×5+8×6=26+56
35+48=82
83=82 (fals)

90÷10+32÷4=22-25÷5
9+8=22-5
17=17 (adevarat)

3×7+3×6=40-6÷6
21+18=40-1
39=39 (adevarat)

Answer 2

8*7-49:7=7*7
56-7=49
49=49

60-3*8=6*6
60-24=36
36=36

25:5+8*6=60-14:2
5+48=60-7
53=53

90-56:7=6*7+5*8
90-8=42+40
82=82

9*8=90-24:3-5*2
72=90-8-10
72=72

7*5+8*6=26+56
35+48=82
83nu este egal cu 82

90:10+32:4=22-25:5
9+8=22-5
17=17

3*7+3*6=40-6:6
21+18=40-1
39=39