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How to practice mathematics synchronously on page 67 of the first volume of the fifth grade?
( 1)3+2=5

90÷5X3=54 (degrees)

50÷5X2=36 (degrees) a: ...................

(2)2+ 1+ 1=4

180÷4X2=90 degrees

180÷4X 1=45 (degrees) a: .................

(3)3÷3= 1 (cm)

1X4=4 (cm)

1X5=5 (cm) a: .......................

Note: My book belongs to Shandong Education Publishing House.

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