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Primary school mathematics graduation review simulation test questions (3) answers
1、 π*[2*( 10+7.5)/2/π]? =78.5 (square centimeter) Formula: S=π*r? ; l=2ab=2π*r

2, (90/5)*30=540 (tree)

3,500-20-65 * 4/4 = 55 (km)

4.1500-(1500-800) * 20% =1360 (yuan)

5、 24/? *( 1-37.5%)-24=

6. Suppose that X is needed to complete the work, and B can manufacture Y parts per hour.

18 * x:y * x = 3:5; Y=30 can be calculated. That is, B can make 30 parts per hour.

30 *12 * 3/(3+5) =135 (pieces)