How can you solve multiplication fast with no calculator?

In a survey, 36% of the students said that they kept an electronic diary. There were 900 students who kept an electronic diary. How many students were in the survey?

Maria received 5/7 of the 42 votes cast for class president. how many votes did she receive?

Alexander Pirch the computer on Sara D original price was 1200 the sale price was five and 6/2 of the original price how much did Alexander pay for the computer

How do you find the prime factorization of 504

The band at Crest Elementary School has 9 flutes, 6 clarinets, 3 trumpets, 2 trombones, 1 tuba, and 3 French horns. If one instrumentalist is chosen from the band, what is the probability that the student plays the flute?

Select the correct numeral form of this number written in scientific notation. 5.0 * 10^10 0.000 000 000 5 5,000,000,000 50,000,000,000 500,000,000,000

John has a bag of marbles that contains 12 red marbles 20 green and 17 blue. if john pulls one marble what is the probability that it will be a purple marble

Solve for x: 2 over 3 (x - 4) = 2x. 2 - 2 - 8 - 4

kyle mom made a pone and a cake. she cut the pone into 6 equal parts and the cake into 8 equal parts. his family ate 3/4 of the cake. if his family ate more cake than pone. what fraction of the pone coulh have been eaten.

A Cashier at the local bank is expected to serve 12 customers every hour. In the past 15 minutes, he served 4 customers. Assuming the the cashier continues to work at the same rate, will he meet his goal? Explain