Approximation
We know that the digits of a number, one by one in order from left to right decrease in value rapidly. Let us illustrate it by examples. Mass of a gold ornament is 23.473 g. Round off to (i) two decimal places, (ii) one decimal place. 23.473 g = (2 x 10) + (3 x 1) + Th..
We know that the digits of a number, one by one in order from left to right decrease in value rapidly. Let us illustrate it by examples. Mass of a gold ornament is 23.473 g. Round off to (i) two decimal places, (ii) one decimal place. 23.473 g = (2 x 10) + (3 x 1) + Th..There were 10 people standing in a queue. 5 of them left. Choose a num..
There were 10 people standing in a queue. 5 of them left. Choose a number sentence to show the number of people left in the queue. => 10 - 5 = 6 or h..
A recipe makes 12 servings. Only 8 people are eating. Identify the num..
A recipe makes 12 servings. Only 8 people are eating. Identify the number sentence used to calculate the number of servings left. => n - 8 = 12 or n + 8 = 20 or n + 8 = 12 or 1 + n = 8..
There are 21 sticks in a bundle. 10 sticks were taken out. Choose a nu..
There are 21 sticks in a bundle. 10 sticks were taken out. Choose a number sentence to find the number of sticks left in the bundle. => 21 - 10 = 9 or 21 - 10 = 11 or 21 - 10 = 12 or 21 - 10 = 1..
There were 16 cars in a showroom. 4 cars were sold. Choose a number se..
There were 16 cars in a showroom. 4 cars were sold. Choose a number sentence to find the number of cars that were left in the showroom. => 16 - 4 = 12 or 16 - 4 = 10 or 16 - 4 = 11 or 16 - 4 = 9..
Paul had 19 coins. He gave 16 coins to his grandson. Choose a number s..
Paul had 19 coins. He gave 16 coins to his grandson. Choose a number sentence to show how many are left with Paul. => 19 - 16 = 3 or 19 - 16 = 5 or 19 - 16 = 4 or 19 - 16 = 7..
Jasmine gave 5 strawberries to Lily. Lily ate 2 strawberries. Choose a..
Jasmine gave 5 strawberries to Lily. Lily ate 2 strawberries. Choose a number sentence to show the number of strawberries left with Lily. => 5 - 2 = 3 or 5 - 2 = 2 or 5 - 2 = 7 or 5 - 2 = 5..
Nancy had 5 gold chains. She gave 2 of them to her grand daughter. Cho..
Nancy had 5 gold chains. She gave 2 of them to her grand daughter. Choose a number sentence to find how many gold chains Nancy has left. => 5 - 3 = 4 or 5 - 2 = 3 or 5 - 2 = 2 or 5 - 3 = 1..
7 children were playing at Arthur's house. 4 of them left after someti..
7 children were playing at Arthur's house. 4 of them left after sometime. Choose a number sentence to show the number of children still at Arthur's house. => 7 - 4 = 3 or 7 - 4 = 11 or 7 - 4 = 4 or 7 - 4 = 7..
550 people attended a charity show. Some of them donated $10, and som..
550 people attended a charity show. Some of them donated $10, and some donated $5. The total collection was $4500. Find the number of people who donated $5. => 200 or 150 or 100 or 300..
Result
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