Matematică
Andrea00
3

12+30 4:4+8:2 10 21x 32x21-31x21 -499 +10 88+8 7+3 2+1 12+3 4:4+8:2 9+5 88-8 7+3 2-1

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(1) Răspunsuri
hermeziugigi

12+30=42. ,4:4+8:2=1+4=5. ,21×32×21-31×21-499+10=672×21-651-509=14112-142=13970. ,88+8=96. ,7+3=10, 2+1=3. ,12+3=15, 9+5=14,88-8=80;2-1=1

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