A:Fix My Mistake
9 - 3 x 2 = 12
9 - 3 x 2 = 3 or
(9 - 3) x 2 = 12
3 + 6 x 4
27
(14 + 6) x (12 -4) -9
151
( 9 + 3 x 5 ) ÷ 3
8
10÷5 x 2 = 1
10÷5 x 2 = 4 or
10 ÷ (5 x 2) = 1 or
10 ÷ 5 ÷ 2 = 1
What should I do first?
4 x (3 + 5)
先做那一部份 ?
4 x (3 + 5)
( )
25 ÷ 5 -2
3
(15 - 5) x 10 + 3
103
20 + 45 x 2 ÷ 5
38
5 x 5 +1 = 30
5 x 5 + 1= 26 or
5 x (5 + 1) = 30
121 - 5 + 1
= 121 - 1 + 5 = 125
可以這樣計算嗎? 為什麼 ?
不可以
121 - 5 + 1 = 117
12 - 8 ÷ 2 + 3
11
6 x 8 + ( 7 - 6 )
49
25 x 17 = 25 x (10 +___)
7
4 + 5 + 7 - 3 x 2 = 26
10 or
(4 + 5 + 7 - 3) x 2 = 26
25 - 5 + 10 = 25 - 15 = 10 Is it correct ? Why?
25 - 5 + 10 = 25 - 15 = 10 正確嗎 ? 為什麼 ?
Not correct. We cannot add 5 and10 first.
25 - 5 + 10 = 30
不正確.
20 ÷ (8-3) + 16
20
( 10 + 19 -5 ) x 2
48
225 - 1 x 6 x 5 + 5
200
20 - 5 x 2 + 3 = 33
13 Or
20 + 5 x 2 + 3 =33 Or
(20 - 5) x 2 +3 = 33
May is going to buy 2 T-shirts and 2 dresses.
One T-shirt is $25 and one dress is $100. How much is May going to pay ?
美美想買兩件 T-裇 和 兩條裙。一件T-裇 25元, 一條裙100元。問美美應付多少元?
$25 x 2 + $100 x 2 = $250 or
(25 + 100) x 2 = 250
7 + 3 x (8 ÷ 4)
13
2 x ( 9 x 9 + 2) - 8
158
(4 - 2x2) x 22 x (5x5 - 4x3)
0