Several elementary school math problems ~

1. Make the following fraction the simplest fraction.

0.6 =6/ 10=3/5

0.45 =45/ 100=9/20

0.37 =37/ 100

0.75 =75/ 100=3/4

1.5 =3/2

3.25 = 13/4

Second, the number of scientific and technological works in three classes of grade five in Xingguang Primary School: 36 in class one, 24 in class two and 30 in class three.

(1) What percentage of the total number of first-class scientific and technological works? What about Class Two and Class Three? (Numbers are expressed by the simplest fraction)

Total: 36+24+30=90 (pieces)

1 grade: 36÷90=36/90=2/5

Category II: 24÷90=24/90=4/ 15.

Category III: 30÷90=30/90= 1/3.

(2) According to the given data, put forward a problem expressed by score.

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