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a) 12×(123-23-70)
b)12+23+289+8+11+17
c)321÷3+42÷6+42÷7
d)576÷24-24
e)6754×100-100×6754×10
f)65×65-45×45
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Răspuns :

Salut!

a) 12×(123-23-70) =

12×(100-70) =

12×30 =

360

b) 12+23+289+8+11+17 =

35+289+8+11+17 =

324+8+11+17 =

332+11+17 =

343+17 =

360

c) 321÷3+42÷6+42÷7 =

107+42÷6+42÷7 =

107+7+42÷7 =

107+7+6 =

114+6 =

120

d) 576÷24-24 =

24-24 =

0

e) 6754×100-100×6754×10 =

675400-100×6754×10 =

675400-675400×10 =

675400-6754000 =

-6078600

f) 65×65-45×45 =

4225-45×45 =

4225-2025 =

2200

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