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Elementary school math solution! ! ! ! ! ! ! !
Question 7: 2+3+5 = 10

150÷ three tenths = 500 (kg)

500× two tenths = 100 (kg)

500× 5/10 = 250kg.

Question 8: 5+3 = 8

Five eighths-three eighths = two eighths

(20+20) ÷ 2/8× 5/8 = 100 (yuan)

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