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Complete works of mathematics calculation problems in the fourth grade of primary school
This book about the fourth grade math problems in primary school is specially arranged for everyone, hoping to help everyone!

First, oral calculation.

840÷40= 180×30= 520÷4= 150×4=

350÷7= 720÷30= 36×20= 900÷5=

450÷90= 18×3= 702÷3= 27×3=

2. How many can I put in brackets?

35×( )