Mental Math
25 x 20
500
1.2 = 3.7
What is 4.9
1/4 + 3/8
What is 5/8
2n + 6 = n
n= ?
What is 2
16 x 2
Mental gives double!
What is 32
Daily Double!!
Hint: visualize model math:
125 x 32
What is in the value of hundreds place
27.80 + 1.2
29.00
1 2/5 + 3 1/10
What is 4 1/2
3x + 8 = x
What is 2
8 x 13.5
What is 108
The remainder of 29 dividid by 2
What is 1
28 divided by 2 is 14 so there is one more left over
2.45 x 1.3
What is 3.185
2 3/4 - 1/8
What is 2 3/8
If A= 1/2 bh
What is the area of the isosceles triangle
What is 21
186 divided by 6
Mental math pays double!
What is 31
Using distributive property:
Say outloud the work for 6(7+3)
What is 6 x 7 is 42 and 6 x 3 is 18. 42 + 18 = 60
Daily Double!!
48.0 divided by 2.4
What is 20
13/3 x 3/4
What is 72/12 = 3
See the next angle. What is the measurement of the whole angle given the dimensions provided?
What is 90 degrees
304 divided by 16
What is 19
125 + 39 + 61
What is 2
1 + 9 + 5 is 15 so carry the 10 over.
10 + 60 + 30 + 2 = 120. 2 is in 10s place.
2.33 divided by 1.2
What is 1.941
4/5 divided by 2/3
What is 6/5 =1 1/15
Given the angle provided what the measurement of x?
What is 90 degrees
2500 divided by 50
What is 50