The answers to questions 4, 5, 6, and 7 in the first volume of the fifth grade math book exercise, don't be mean, don't say you can't write, ask if you can write.

4. Solution: Assume that the average annual precipitation in Tongxin County is x mm.

8X+ 109=2325

8x=2325- 109

8x=22 16

x=22 16/8

X=277 A: the average annual precipitation in Tongxin County is 277mm.

5. Solution: Suppose the elephant can reach X kilometers per hour at the earliest.

2X+30= 1 10

2x= 1 10-30

2x=80

x=80/2

x=40

A: Elephants can reach 40 kilometers per hour at the fastest.

6. Solution: Let the area of Oceania be x million square kilometers.

4x+8 12=4400

4x=4400-8 12

4x=3588

x=3588/4

x=897

A: The area of Oceania is 8.97 million square kilometers.

7. Solution: Let the child's body temperature be equivalent to X degrees Celsius.

1.8x+32=98.6

1.8x=98.6-32

1.8x=66.6

x=66.6/ 1.8

x=37

A: The child's temperature is equivalent to 37 degrees Celsius.

If so, please adopt it! ! !