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Primary school people's education edition, the first volume of sixth grade mathematics textbook, 9 1, urgently seeking an answer! ! ! ! ! ! !
1.( 1)5 20

(2) 1000 20

2.( 10-7)÷7× 100%≈42.9%

3.( 16- 14)÷ 16× 100%= 12.5%

Solve it yourself

5.(4350-2700)÷4350× 100%≈37.9%

6.( 1.25- 1.2)÷ 1.2× 100%≈4.2%

7.(30- 18)÷ 18× 100%≈66.7%

(30- 18)÷ 12× 100%= 150%

8. Analysis: The volume of the sawed cube is V = A33× 3x3 = 27 (cm3).

The original volume is v = abh5× 4× 3 = 60 (cm3).

(60-27)÷60× 100%=55%

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