David Rodriguez 7B

Mirlena had saved $ 2,250 pesos and bought a toy that cost her $ 790 pesos. How much money did she have now?

The triple of the distance from the sun to the earth is 450 million kilometers, what is the distance from the ground to the earth?

If the 280 high school students meet, if from eleven grade are 51, how many students are from the other grades?

Four times the number of books that has heriberto is 64, how many books has he?

Half of the third part of 18 is?

Nicole used 3/4 of a box of 12 pencils. How many pencils didi she used?

the perimeter of a square is 48cm. How is measure of the side?

the distance between two cities is 63.5km. Mauricio had drived 23.68km, how many km are left?

I bought a jacket in $225, with a discount of 25%, which was the original price?

the area of a rectangle whose dimensions measure 12.5m and 4m is:

the square root of a negative number is?

4 machines imprime 40 posts dialy. In one month (30 days), how many posts will imprime 8 machines in 2 months

in the moon the weight of a person is 1/6 of his weight in the earth. If this person weights in the moon 11kg aprox, how many kg weights in the earth?

solve the equation: 2x + 5 = 3x - 1

add 3xy + 3yz − 0,1xz − 200y + 0,5 plus 13xy -28xz − 20y + 0,8