MENTAL MATH - INVEST 6 to LESSON 70 Flashcards
1
Q
Count up and down by 1/4’s between 1/4 and 4.
A
1/4, 1/2, 3/4, 1. 1 1/4, 1 1/2, 1 3/4, 2, 2 1/4, 2 1/2, 2 3/4, 3, 3 1/4, 3 1/2, 3 3/4, 4
2
Q
4 x 750
A
3000
3
Q
283 + 250
A
533
4
Q
750 - 199
A
551
5
Q
$8.25 - $2.50
A
$5.75
6
Q
Double 12 1/2
A
25
7
Q
900/30
A
30
8
Q
6 x 10, ÷ 3, x 2, ÷ 4, x 5, ÷ 2, x 4
A
100
9
Q
Count by 12’s from 12 to 144
A
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144
10
Q
5 x 40
A
200
11
Q
475 + 1200
A
1,675
12
Q
3 x 84
A
252
13
Q
$8.50 + $2.50
A
$11.00
14
Q
1/3 of $36.00
A
$12.00
15
Q
$25/10
A
$2.50
16
Q
6 x 8, - 4, ÷ 4, x 2, + 2, ÷ 6, ÷ 2
A
2
17
Q
Hold your hands 1 foot apart
A
Yay, you did it!
18
Q
Count up and down by 1/8’s between 1/8 and 2.
A
1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1 1/8, 1 1/4, 1 3/8, 1 1/2, 1 5/8, 1 3/4, 1 7/8, 2
19
Q
5 X 140 (10 X 140 ÷ 2)
A
700
20
Q
420 - 50
A
370
21
Q
4 X 63
A
252
22
Q
$8.50 - $2.50
A
$6.00
23
Q
Double 7 1/2
A
15
24
Q
$25/100
A
$0.25
25
5 x 10, - 20, + 2, ÷ 4, + 1, ÷ 3, -3
0
26
Hold your hands one foot apart, then one inch apart.
Wow, look at you!
27
Count up and down by 25's between 25 and 300.
25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300
28
5 x 240
1200
29
4500 + 450
4,950
30
7 x 34
238
31
$7.50 + $7.50
$15.00
32
1/4 of $20.00
$5.00
33
$75/10
$7.50
34
6 x 8, ÷ 2, + 1, ÷ 5, - 1, x 4, ÷ 2
8
35
Hold your hands one foot apart, then one yard apart.
You sure about that?
36
Count by 9's from 9 to 108
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108
37
5 x 60
300
38
586 - 50
536
39
3 x 65
195
40
$20.00 - $2.50
$17.50
41
Double $0.75
$1.50
42
$75/100
$0.75
43
9 x 9, - 1, ÷ 2, + 2, ÷ 6, + 3, ÷ 10
1
44
Hold your hands one yard apart, then one meter apart.
Yep, a yard is 3 feet, and a meter is a smidge more. Nice!
