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Fix My Mistake
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Solve 2
Fix Mistake 2
100

9 - 3 x 2 = 12

9 -3 x 2 = 3

100
If I have addition and subtraction in my expression, I should move from ______ ___ _______.

left to right

100

3 + 6 x 4

27

100

(14 + 6) x (12 -4) -9

151

100

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

200

10÷5 x 2 = 1

10÷5 x 2 = 4 

200

Why is it important to know PEMDAS as a mathematician?

So that everyone is solving the problem in the same way

200

25 ÷ 5 -2

3

200

(15 - 5) x 10  + 3

103

200

(48÷6+10)×(12−5)−30÷(4+2)=90

  1. Parentheses:

    • 48÷6=8

    • 8+10=18

    • 12−5=7

    • 4+2=6

  2. Rewrite:

18×7−30÷6

  1. Multiply/Divide left to right:

    • 18×7=126

    • 30÷6=5

  2. Final: 126−5=121


121


300

5 x 5 +1 = 30

5 x 5 + 1= 26

300

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

300

12 - 8 ÷ 2 + 3

11

300

6 x 8 + ( 7 - 6 )

49

300

(120÷(15−3))×(20−6)+81÷(9−6)−(14−9)=150


    • 15−3=12

    • 20−6=14

    • 9−6=3

    • 14−9=5

  2. Rewrite:

120÷12×14+81÷3−5

  1. Multiply/Divide left to right:

    • 120÷12=10

    • 10×14=140

    • 81÷3=27

  2. Final: 140+27−5=162


162


400

4 + 5 + 7 - 3 x 2 = 26

4 + 5 + 7 - 3 x 2 = 10

400

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

400

20 ÷ (8-3) + 16 

20

400

( 10 + 19 -5 ) x 2

48

400

(200÷(25−5))+(18×4−12)−96÷(8+4)=40

62



    • 25−5=20

    • 18×4=72

    • 72−12=60

    • 8+4=12

  2. Rewrite:

200÷20+60−96÷12

  1. Multiply/Divide left to right:

    • 200÷20=10

    • 96÷12=8

  2. Final: 10+60−8=62

 

500

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.

500

A gardener plants 4 rows of 7 flowers. Then she removes 6 flowers that wilted. What expression shows how many flowers remain?

(4x7)-6

500

7 + 3 x (8 ÷ 4)

13

500

2 x ( 9 x 9 + 2) - 8

158

500

(48÷6+10)×(12−5)−30÷(4+2)=90

 


    • 48÷6=8

    • 8+10=18

    • 12−5=7

    • 4+2=6

  2. Rewrite:

18×7−30÷6

  1. Multiply/Divide left to right:

    • 18×7=126

    • 30÷6=5

  2. Final: 126−5=121

Correct Answer:121