Perfect Squares
42 = ?
16
653 km= __________cm
65 300 000 cm
44-(2 x 9)=?
= 44-18
=26
Square Root of 81
9
Angelica and Eliza are arguing about a problem on a math worksheet. Rory says that 122 = 24 because you multiply 12 by the number on top. Eliza says that 122 is equal to 144, because you multiply the base as many times as it shows on the top. Who is correct? Explain your Thinking.
Eliza is correct. I know this because in order to find the answer to an exponent, you multiply the base number as many times as the exponent telle you to. For example, 122 is also equal to 12 x 12 = 144. Therefore, Eliza is correct.
82 = ?
64
90.346 cm=_______________m
0.90346 m
36-(7x3)=?
= 36-21
= 15
14
Yoda is tilling his 4 m x 4 m floor. He goes to Home Depot to buy some 5 dm x 5 dm tiles, but needs to figure out how much he needs. Can you teach Yoda to figure out how many tiles he needs?
No, I will not teach Yoda!
First, you must convert 5 dm into m.
5 dm = 0.5 m
Then, 4 ➗ 0.5 = 8 two times
Lastly, you multiply 8 by 8, which gives you 64 tiles needed.
182 =?
324
100 dm2 =______________ cm2
10000 cm2
8.5-2.2x3=?
= 8.5-6.6
=1.9
Square Root of 361
19
Rico is at the local Curry’s,to buy paint. Her canvas is 27 cm x 27 cm and costs $24. Each bottle of paint she buys covers 3 cm of the canvas. Each bottle of paint costs $2. How much money does Rico spend?
27 ➗ 3 = 9 bottles used
$2 x 9 = $18
$18 + $24 = $42
Rico spends 42 dollars.
222 = ?
484
6.8902km2 =_____________m2
6890200 m2
82 ➗(6.8-2.8)=?
= 82➗4
= 64➗4
= 16
Square Root of 3 600
60
Emma played 6 games of tennis. She scored 76 points in the first game, 88 points each in the next two games and 92 points for the following two games. She scored 515 points altogether. Write the expression and calculate the number of points she scored in the last game.
76+(88x2)+(92➗2)
= 76+176+(92➗2)
= 76+176+46
= 298
515-298=217
217 points scored in the last game
532 = ?
2809
489.124 mm=______________km
489124000 km
9.6➗(4.2-1)+(3+2)2
= 9.6➗3.2+(3+2)2
= 9.6➗3.2+25
= 3+25
= 28
Square Root of 2025
40
Inky brings $85 450 to buy tiles. She has at room that is 30m2. If she wants to tile the room using 5 cm x 5 cm, one tile costing $8, how much more money needed? If not, how much change does Inky get back?
30m2= 5m x 6m
5m= 500cm
6m= 600cm
500➗5= 100
600➗5= 120
100 x 120= 12 000
12 000 x 8= 96 000$
$96 000-$85 450= $10 550
Inky needs $10 550 in order to buy the tiles.