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The answer to the wisdom island on page 55 of Classroom Standards, the second volume of mathematics in the fifth grade of primary school
Every group has it.

4+2 = 6

62÷6= 10……2

Bai Zhuyou

4× 10+2 = 42.

Black pig friend

2× 10 = 20.

White beads account for the total

42 ÷ 62 = 3 1.2 1

Black beads account for the total.

20 ÷ 62 = 3 1. 10

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