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Stiind ca a=72÷8÷3×3 iar b=80÷8÷5×4 calculați a+b,a-b,a×b.

Răspuns :

a=72÷8÷3×3 = 9:3x3 = 9

b=80÷8÷5×4 = 10:5x4 = 2x4 =8

a+b = 9+8 = 17

a-b = 9-8 = 1

axb = 9x8 = 72

a=9:3•3=3•3=9
b=10:5•4=2•4=8

a+b=9+8=17
a-b=9-8=1
a•b=9•8=72