2乘以-13=-26
-5+3=-2
-2-（-26）=24
----Can I help you?----I want to buy a scarf for my mother--- There are some new styles.You can have a look.---The purple one looks very good.How much is it?---One hundred and fifty yuan---I'll take it.---How do you pay?In cash or by credit card.--In cash.--Here is your reipt.Thank you for your shopping.Good--bye!
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