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COMPARISON
CONCEPT
Developed byIvan Seneviratne
7 more than 15 is _____.
The statement ‘7 more than 15’ means ‘7 is added on to 15’.
15 – 7 = 8
The unknown value is 8.
15
7
?
more than
COMPARISON CONCEPT
7 more than 15 is _____.
From the model, you can write down the following equation
15 + 7 = 22
The unknown value is 22.
15 7
more than
?
COMPARISON CONCEPT
7 more than _____ is 22.
The statement ‘7 more than means ‘7 is added on to’.
From the model, you can write down the following equation.
22 - 7 = 15
The unknown value is 15.
? 7
more than
22
COMPARISON CONCEPT
_______ more than 15 is 22.
15 ?
22
more than
The statement ‘more than’ means ‘is added on to’.
From the model, you can write down the following equation.
22 - 15 = 7
The unknown value is 7.
COMPARISON CONCEPT
6 less than 14 is _____.
From the model, you can write down the following equation.
14 - 6 = 8
The unknown value is 8.
14
6
Less than?
COMPARISON CONCEPT
6 less than _______ is 8.
The words ‘less than’ means ‘is subtracted from’.
?
6
less than
8
COMPARISON CONCEPT
6 less than _______ is 8.
?
6
less than
8
From the model, you can write down the following equation.
8 + 6 = 14
The unknown value is 14.
COMPARISON CONCEPT
8 is _______ less than 14.
14
?
less than
8
From the model, you can write down the following equation.
14 - 8 = 6
The unknown value is 6.
COMPARISON CONCEPT
A. 191 more than ____ is 245.
B. 525 is _____ less than 565.
TRY THESETRY THESE
COMPARISON CONCEPT
SOLUTIONS
A.
191 more than 54 is 245.
B.
525 is 40 less than 565
? 191
more than
245
525 ?
565
less than
COMPARISON CONCEPT
NEWMAN’S SCHEME
Read Comprehend Know a strategy Transform Compute Consider the situation
Mr. Kumar sold 483 copies of newspapers on Monday and 520 copies of newspapers on Tuesday. How many more copies of newspapers did he sell on Tuesday than on Monday?
520 - 483 = 37
Mr. Kumar sold 37 more copies of newspapers on Tuesday than on Monday.
To find ? , subtract 483 from 520.
Monday
Tuesday
?483
520
COMPARISON CONCEPT
A. Maria spent $230. She spent $82 more than Hale. How much money did both of them spend altogether?
B. Book A has 418 pages. Book B has 64 pages fewer than Book A and 126 pages more than Book C. Find the total number of pages in the three books.
C. A secretary ordered 560 blue pens. She ordered 148 blue pens more than red pens and 276 blue pens fewer than black pens. What was the total number of pens that she ordered?
TRY THESETRY THESE
COMPARISON CONCEPT
A. Maria spent $230. She spent $82 more than Hale. How much money did both of them spend altogether?
First, find the amount of money Hale spent by subtract 82 from 230.
$ 230 - $ 82 = $ 148
Then, find the total amount of money that Maria and Hale spent.
$ 230 + $ 148 = $ 378
Both of them spent $ 378 altogether.
$82
Maria
Hale
?$ 230
COMPARISON CONCEPT
B. Book A has 418 pages. Book B has 64 pages fewer than Book A and 126 pages more than Book C. Find the total number of pages in the three books.
First, to find the number of pages in Book B, subtract 64 from 418.
418 - 64 = 354
To find the number of pages in Book C, subtract 126 from 354.
354 - 126 = 228
To find the total number of pages in the three books, add all the pages of the 3 books.
418 + 354 + 228 = 1000
The total number of pages in the three books is 1000.
Book C
?
Book A
Book B 64
126
418
COMPARISON CONCEPT
C. A secretary ordered 560 blue pens. She ordered 148 blue pens more than red pens and 276 blue pens fewer than black pens. What was the total number of pens that she ordered?
First, find the number of red pens : 560 - 148 = 412
Then, find the number of black pens : 560 + 276 = 836
Next, total number of pens : 560 + 412 + 836 = 808
The total number of pens she ordered was 1808.
Blue pens
Red pens
Black pens
?276148
560
COMPARISON CONCEPT
Zasha’s mass is ½ the mass of Yulin. Dzaki’s is 2/3 as heavy as Zasha. If Yulin’s mass is 48 kg, find the masses of Zasha and Dzaki.
Zasha
Yulin
Dzaki
48
6 units 48 kg
1 unit 8 kg
2 units 2 x 8 = 16 kg
3 units 3 x 8 = 24 kg
Zasha’s mass is 24 kg and Dzaki’s mass is 16 kg.
COMPARISON CONCEPT
A. Marvis has 3/10 m of ribbon. Cindy has 1/5 m of ribbon more than Marvis. Find the total length of ribbon that Marvis and Cindy have.
B. Mr. Li is 5 years older than his sister. ½ of his age is equal to 2/3 of his sister’s age. How old is his sister?
C. Xiali’s weight is ¾ of Yusuf’s weight. Zaenab is 2/3 as heavy as Xiali. If Yusuf’s weight is 48 kg, find the weight of Zaenab.
TRY THESETRY THESE
COMPARISON CONCEPT
This presentation is developed by Ivan Seneviratne © 2005 purely for personal [email protected]
