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Answers 42, 43 (Jiangsu Education Edition) in the second volume of the fifth grade math exercise book are urgent, urgent, urgent, urgent, urgent, urgent, urgent, urgent, urgent.
Forty two.

1. (vertical) 6,2,90,82, 1, 2,63,30

2.3/4=9/ 12 2/3=8/ 12

3. (Vertical) 6, 15, 10,10,8,18,24,28

4. Simultaneous× 4 simultaneous× 7 simultaneous× 3 simultaneous× 2

5.( 1) is not simple enough for (2). (3) Error

6. 1.2/3=6/9 5/9=5/9 2.2/7= 16/56 2/8= 14/56 3.7/6= 2 1/ 16 8/9= 16/ 18

4.3/5=6/ 10 3/2= 15/ 10 5.9/4=8 1/36 4/9= 16/36 6.7/ 12= 14/ 12 7/8=2 1/24

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