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The fourth grade of primary school, the first volume of math problems, linear calculation exercises.
1、475+254+36 1 2、6 15+475+ 125 3、860- 168+ 159

4、465+358-27 5、647-(85+265) 6、476+(65-29)

7、 154×8÷ 16 8、400÷25×75 9、 16×25÷ 16×25

10、552÷69×8 1 1、600- 120÷ 10 12、(600- 120)÷ 10

13、(466-25×4)÷6 14、(43+32)÷(357-352)

15、 138+(27+48)÷25 16、56× 19+25×8

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