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Exponents - Add and Subtract
This Math quiz is called 'Exponents - Add and Subtract' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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An exponent is a small superscript number that tells you how many times a number is multiplied by itself. For example, if you have the number 4 and you want to multiply it by itself five times you could write it out as follows:
4 x 4 x 4 x 4 x 4 =
7 x 7 = 49 x 7 = 343
3 x 3 = 9 x 3 = 27 x 3 = 81
343 + 81 + 16 = 440
73 + 34 + 16 = 440
12 x 12 = 144
7 x 7 = 49 x 7 = 343 x 7 = 2401 x 7 = 16807
144 + 16807 = 16951
122 + 75 = 16951
8 x 8 = 64
2 x 2 = 4 x 2 = 8
64 + 8 = 72 - 14 = 58
82 + 23 - 14 = 58
4 x 4 = 16 x 4 = 64 x 4 = 256
4 x 4 = 16 x 4 = 64
10 + 256 = 266 - 64 = 202
10 + 44 - 43 = 202
10 x 10 = 100
12 x 12 = 144 x 12 = 1728
9 x 9 = 81
100 + 1728 = 1828 - 81 = 1747
102 + 123 - 92 = 1747
6 x 6 = 36 x 6 = 216
5 x 5 = 25 x 5 = 125 x 5 = 625
3 x 3 = 9 x 3 = 27 x 3 = 81 x 3 = 243
216 + 625 = 841 - 243= 598
63 + 54 - 35 = 598
Answer (b), therefore, shows the correct Order of Operation
100 x 100 = 10000
50 x 50 = 2500
10000 - 2500 = 7500 + 17 = 7517
1002 - 502 + 17 = 7517
2 x 2 = 4 x 2 = 8 x 2 = 16
9 x 9 = 81 x 9 = 729
16 + 729 = 745
24 + 93 = 745
5 x 5 = 25 x 5 = 125
6 x 6 = 36 x 6 = 216 x 6 = 1296
125 + 1296 = 1421
53 + 64 = 1421
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28 x 28 = 784
13 x 13 = 169
784 - 169 = 615
282 - 132 = 615