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