Mental Math
3600 ÷ 40
What is 90?
190 ÷ 6
What is 31 R4, 31 4/6 OR 31.6?
3.6 ÷ 0.04
What is 90?
Explain why 3.6 ÷ 0.04 has the same answer as 360 ÷ 4.
the divisor and dividend are both multiplied by 100, and the decimal moves 2 places to the right.
A farmer ships 4 times as many oranges as tangerines. The Farmer ships 8,260 oranges. How many tangerines does he ship? Write an equation and solve.
4 x t = 8,260; 8,260 ÷ 4 = t
What is 2,065 tangerines?
5600 ÷ 700
What is 8?
363 ÷ 9
What is 40 R3, 40 3/9, OR 40.3?
34.5 ÷ 0.05
What is 690?
Why does dividing 5 by a decimal less than 1 give a quotient greater than 5?
What is...
you are dividing 5 into parts smaller than a whole, so there will be more than 5 parts?
Paige's backyard has an area of 95.9 square meters. The length of the yard is 14 meters, what is its width?
A= l x w; 95.9 = 14 x w
What is 6.85 meters?
What is 5.2?
4004 ÷ 11
What is 364?
468 ÷ 0.9
What is 520?
When you divide by 100, each DIGIT shifts ___ places to the ____. (Think about 2.45 ÷ 100)
What is 2 places to the right? (The decimal moves 2 places to the left)
In a movie, 289 aliens plan to visit Earth. Each ship can hold as many as 3 aliens. What is the least number of ships needed?
What is ....
97 ships are needed? Round up.
42 ÷ 0.06
What is 700?
298 ÷ 12
What is 24 R10, 24 10/12, OR 24.83?
$78 divided by 8.
What is $9.75?
Marco got a quotient of 70 when he divided 49 by 0.07. Is this correct? If not, what is the correct answer?
What is...No, it is not correct?
What is...700?
Basma cuts ribbon to tie onto balloons for the carnival. She has 925.6 inches of ribbon in all. If each ribbon must be 24 inches long, how many ribbons can she cut?
What is...
Basma can cut 38 ribbons?
Ignore the remainder.
9 ÷ 1000
What is 0.009?
845 ÷ 25
What is 33 R20 , 33 20/25, OR 33.8?
6/11
What is 0.5454?
2Fill in the blanks.
36 ÷ 101 = ____
36 ÷ ____ = 0.36
36 ÷ 103 = _____
What is ...?
3.6
102
0.036
Six miners divide 15 ounces of gold dust equally. How many ounces of gold dust does each miner receive?
What is...
each miner will receive 2.5 ounces of gold dust?