Dividing with Powers of 10
What is 1600 divided by 4?
What is 400
16 divided by 4 = 4
so 1600 (100 times bigger) divided by 4 = 400
What is 1/5 of 55?
What is 11
1/5 of 55 = 55 divided by 5
What is 4 divided by 1/2?
How many halves are there in 4?
What is 8
There are 2 halves in 1 so there are 4 (2) halves in 4
4(2) = 8
What is 30 x 10?
What is 300
3 x 1 = 3
Move decimal 2 places = 300
What is 6 x 24?
What is 144
6 x 24 = 6( 20 + 4)
6(20) + 6(4)
120 + 24 = 144
120 + 24 = 144
What is 480 divided by 60?
What is 8
divide both numbers by 10
48 divided by 6 = 8
What is 1/4 of 840?
What is 210
1/4 of 800 = 200
1/4 of 40 = 10
What is 3 divided by 1/4?
How many fourths are there in 3?
What is 12
How many fourths are there in 1?
There are 4 one-fourths in 1 so there are 3 (4) =12 fourths in 3
What is 300 multiplied by 7?
What is 2100
3 x 7 = 21 so
300 x 7 = 2100
What is 83 x 3?
What is 249
3(83)= 3 (80 + 3)
3(80) + 3(3)
240 + 9 = 249
What is 2800 divided by 140?
What is 20
Divide both numbers by 10 so this is the same as
280 divided by 14
What is 3/8 of 24?
What is 9
1/8 of 24 is the same as 24 divided by 8 = 3
so 3/8 of 24 = 3 x 3 = 9
What is 7 divided by 1/3?
How many 1/3's are there in 7?
What is 21
There are 3 one-thirds in 1 so there are 7 x 3 = 21 one-thirds in 7
What is 150 x 30?
What is 4500
15 x 3 = 45
so 150 x 30 = 4500
What is 72 x 3?
What is 216
72 x3 = 3(70 + 2)
3(70) + 3(2)
210 + 6 = 216
What is What is 720 divided by 900?
What is 0.8
Divide both # by 10 so same as 72 divided by 90
72 divided by 9 = 8 so 72 divided by 90 is 10 times smaller
What is 2/6 of 72?
What is 24
1/6 of 72 = 12
so
2/6 of 72 = 2(12) = 24
What is 4 divided by 2/5?
How many 2/5's are there in 4?
What is 10
There are 5 one-fifths in 1
so there are 4(5)= 20 one-fifths in 4.
2/5 is twice as big as 1/5 so there are half as many 2/5's as 1/5's
1/2 of 20 = 10
What is 36 times 30?
What is 1080
36 x 3 = 90 + 18 = 108
30 is 10 times bigger than 3 so
108 x 10 = 1080
What is 8 x 112?
What is 896
8 x 100 = 800
8 x 10 + 80
8 x 2 = 16
800 + 80 + 16 = 896
What is 0.8 divided by 0.4?
What is 2
Multiply both numbers by 10 to move decimal to right
8 divided by 4 = 2
What is 2/3 of 180?
What is 120
1/3 of 18 =6 Divide by 3
so 1/3 of 180 = 60
2/3 = 2 (60) = 120
What is 16 divided by 2/3?
How many 2/3's are in 16?
What is 24
How many 1/3's are in 16? There are 3 one-thirds in 1 so 3(16) = 48 one-thirds in 16
Since 2/3 is twice as large as 1/3 there are half as many 2/3 as 1/3 so 48 divided by 2 = 24
What is 110 x 300
What is 33000
11 x 3 = 33
Move decimal point 3 places to right = 33000
What is 5 1/2 x 6?
What is 33
5 1/2 x 6 = 6 (5 + 1/2)
6 (5) + 6 (1/2)
30 + 3 = 33