Fix My Mistake
9 - 3 x 2 = 12
9 -3 x 2 = 3
left to right
3 + 6 x 4
27
(14 + 6) x (12 -4) -9
151
18 ÷ (3 × 2) + 4 × (5 – 1) = 22 Fix the mistake and give the correct answer.
They divided 18 by 3 first, ignoring the parentheses. Correct answer: 18 ÷ 6 + 4 × 4 = 2 + 16 = 18
10÷5 x 2 = 1
10÷5 x 2 = 4
Why is it important to know PEMDAS as a mathematician?
So that everyone is solving the problem in the same way
25 ÷ 5 -2
3
(15 - 5) x 10 + 3
103
(48÷6+10)×(12−5)−30÷(4+2)=90
Parentheses:
48÷6=8
8+10=18
12−5=7
4+2=6
Rewrite:
18×7−30÷6
Multiply/Divide left to right:
18×7=126
30÷6=5
Final: 126−5=121
121
5 x 5 +1 = 30
5 x 5 + 1= 26
A baker makes 5 trays of cookies with 6 cookies on each tray. Then he eats 3 cookies. What expression shows how many cookies are left?
(5 x 6) -3
12 - 8 ÷ 2 + 3
11
6 x 8 + ( 7 - 6 )
49
(120÷(15−3))×(20−6)+81÷(9−6)−(14−9)=150
15−3=12
20−6=14
9−6=3
14−9=5
Rewrite:
120÷12×14+81÷3−5
Multiply/Divide left to right:
120÷12=10
10×14=140
81÷3=27
Final: 140+27−5=162
162
4 + 5 + 7 - 3 x 2 = 26
4 + 5 + 7 - 3 x 2 = 10
A class has 8 groups of 3 students. Then 4 new students join the class. What expression shows the new total number of students?
(8x3)+4
20 ÷ (8-3) + 16
20
( 10 + 19 -5 ) x 2
48
(200÷(25−5))+(18×4−12)−96÷(8+4)=40
62
25−5=20
18×4=72
72−12=60
8+4=12
Rewrite:
200÷20+60−96÷12
Multiply/Divide left to right:
200÷20=10
96÷12=8
Final: 10+60−8=62
The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?
I did not multiply first. The answer should be 13.
A gardener plants 4 rows of 7 flowers. Then she removes 6 flowers that wilted. What expression shows how many flowers remain?
(4x7)-6
7 + 3 x (8 ÷ 4)
13
2 x ( 9 x 9 + 2) - 8
158
(48÷6+10)×(12−5)−30÷(4+2)=90
48÷6=8
8+10=18
12−5=7
4+2=6
Rewrite:
18×7−30÷6
Multiply/Divide left to right:
18×7=126
30÷6=5
Final: 126−5=121
Correct Answer:121