2x5=10 and multiplication is commutative over whole numbes = 7+ 5 = 3+9 = 12 =la (3+6) +5 = 3+ (4+5)
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Answer:
12=12=12=la 45=27
Step-by-step explanation:
7+5=12
3+9=12
(3+6)+5=(9)5=45
3+(4+5)=3(9)=27
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