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Questions in Grade Middle-school

[Open]Biruk wants to buy a book for $15.25 and a book for $4.85. He wants to pay with one $20 bill. Use estimation to decide if this is reasonable. Explain to which place value you should round for an estimate that is useful in this situation.

[Open]Ivan has 6 times as many blue beads as red beads. He has 49 red and blue beads in all. How many blue beads does Ivan have?

[Open]What is needed in order to cause an object at rest to move, or an object in motion to change direction or speed?

[Open]Write a doubles fact you can use to find the sum of \(6 + 7\).

[Open]Hunter won 89 percent of his wrestling matches this year and came in third at the state tournament. If he competed in 46 matches over the course of the season (including the state tournament), how many did he lose?

[Open]What is the answer to this? Show your work. \[ \frac{18}{9} + 3^2 \]

[Open]Turn \(\frac{8}{200}\) into a decimal using an equivalent fraction. Show your steps.

[Open]A drop on a wooden roller coaster is -98 1/2 feet. A drop on a steel roller coaster is 100 1/4 feet lower than the drop on the wooden roller coaster. What is the drop on the steel roller coaster?

[Open]If atoms of a halogen nonmetal gain one electron, the atoms then have how many valence electrons?

[Open]Write 841.50 in expanded form.