Basic Addition
Fix my Mistake
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Advanced Addition & Subtraction
100
-6 + 6
0
100
9 - 3 x 2=12
Correct answer is 3. Do x then -, not - then x.
100
3 + 4 x 5
23
100
14 - 2 x 7
0
100
-3 - 2 + 4
-1
200
5 + (-7)
-2
200
5 - 8 + 1= -4
Correct Answer is -2. PEMDAS means that + and - are done in the order of which comes first. If subtraction is first then you start with that.
200
7 + (2 x 4) - 1
14
200
49 ÷ (3+4) + 5 * 5
32
200
10 + 20 - (-8)
38
300
-3 + (-9)
-12
300
-5 * -10 = -50
Correct answer is positive 50. Remember the tic tac toe board and you'll see that a negative times a negative is a positive.
300
40 ÷ (4+4) + 19 - 1
23
300
5 + 14 ÷ 2 × 5
40
300
-5 + (-10) - (-8)
7
400
-17 + 13
-4
400
4 + 5 + 7 - 3 x 2 = 26
You need to follow PEMDAS and do x first. Correct answer is 10.
400
20 – (5+3) x 2 + 4
8
400
(4-1) * 2 + (5+ 1)
12
400
-100 + (-50) - 25
-175
500
-2 + 5 + (-7)
-4
500
80/2 + 9 * 2 = 98
Correct answer is 58. Instead of working left to write, follow PEMDAS. Do / then * then + in this problem.
500
(5 x 4) – 6 ÷ 2 + 9
26
500
7 - (-1) + 8 * (9 - 10)
-16
500
-76 + 6 + 10 + (-5)
-65
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