Showing posts with label Elementary Math. Show all posts
Showing posts with label Elementary Math. Show all posts

Understanding Rate Charts and Simple Bills | 3rd Grade Maths Money Lesson

Money: Rate Charts and Simple Bills

Introduction

Rate chart is seen in shops. Rate chart gives details about the rate of each item available in a shop. Bills are given by the shopkeepers to the customers as an acknowledgment of purchase. Bills give us complete details about the purchase.

Understanding Rate Charts and Bills

Rate Charts

Rate chart is seen in shops. Rate chart gives details about the rate of each item available in a shop.

Bills

Bills are given by the shopkeepers to the customers as an acknowledgment of purchase. Bills give us complete details about the purchase.

Observe the menu card.

Priya went to a restaurant and the waiter gave her a menu Card. The menu card showed the food items and the rate of each item.

Menu Card from Hotel Foods

Priya and her friend ordered the following items from the menu card.

List of items ordered by Priya

Once she finished eating the waiter gave her the bill.

Bill for Priya's order

The bill shows the food items order by Priya and the total amount to be paid by her.

From the above bill, we come to know the following details:

i. Name of the Restaurant Hotel foods

ii. Bill number 25

iii. Date of the bill 30.10.2019

iv. Total number of items eaten 3

v. Total amount of money to be paid 20

vi. Rate of one idly 10

vii. Rate of one dosai 30

viii. Rate of one masala vadai 5

ix. Rate of two poori sets 90

Practice Exercises

1. The following are the items eaten by Raju and his family. Fill in the blanks using the given bill.

Bill for Raju's family

i. Name of the Restaurant HOTEL foods

ii. Bill number 32

iii. Date of the bill 30 . 10 . 2019

iv. Total number of items eaten 3

v. Total amount of money to be paid 310.

2. Complete the given bill and find the total amount to be paid.

Bill to be completed

3. Prepare Bills for the items purchased using the given rate chart.

Rate chart for stationery items

i. Ramya bought two pens three erasers and a sketch packets. Prepare a bill for her purchase.

Bill for Ramya's purchase

ii. Ravi bought an eraser a sharpener and two pens. Prepare a bill for his purchase.

Bill for Ravi's purchase

Activity

Collect bills from different shops and prepare an album.

Example of bills collected for an album

Mastering Lattice Multiplication: 3rd Grade Maths, Term 2, Chapter 1

Lattice Multiplication: 3rd Maths Term 2, Unit 1

Chapter: 3rd Maths : Term 2 Unit 1 : Numbers

Lattice multiplication is helpful while dealing with numbers with more than two digits. We follow the following steps in Lattice multiplication.

Multiplication Methods

Multiplication of a number with other number can be done in the following ways.

(i) Dot multiplication

(ii) Repeated addition

(iii) Regrouping

(iv) Standard multiplication algorithm

(v) Lattice multiplication

Lattice multiplication:

Lattice multiplication is helpful while dealing with numbers with more than two digits. We follow the following steps in Lattice multiplication.

Let's look at two examples: (i) 52 × 36 and (ii) 893 × 25

Step 1: Write the numbers to be multiplied as follows.

Lattice Multiplication Step 1

Step 2: Draw diagonals of the square.

Lattice Multiplication Step 2

Step 3: Multiply the numbers and write them in the cells as shown below.

Lattice Multiplication Step 3

Step 4: Find the sum of each diagonal and write as follows.

Lattice Multiplication Step 4

Step 5: Arrange the sum to get answer as follows.

Lattice Multiplication Step 5

Exercise

1. Find the product using standard algorithm:

(i) 20 × 2=

Solution for 20 x 2

Product 20 × 2 = 40

(ii) 21 × 4 =

Solution for 21 x 4

Product 21 × 4 = 84

(iii) 65 × 5 =

Solution for 65 x 5

Product 65 × 5 = 325

(iv) 14×3=

Solution for 14 x 3

Product 14 × 3 = 42

(v) 26 × 10 =

Solution for 26 x 10

Product 26 × 10 = 260


2. Complete the following table

(i) If the cost of one pen is ₹ 5, what will be the cost of 8 pens? 8 × 5 = 40

(ii) If there are 7 balls in a bag, how many balls will be there in 4 bags? 4 × 7 = 28

(iii) If the cost of one book is ₹ 10, what will be the cost of 7 books? 7 × 10 = 70

(iv) If there are 6 buttons in a shirt, how many buttons will be there in 3 shirts? 3 × 6 = 18


3. Find the product of the following numbers using lattice multiplication

(i) 22× 25

Lattice multiplication of 22 x 25

Answer : 550

(ii) 34 × 51

Lattice multiplication of 34 x 51

Answer : 1734

(iii) 45 × 24

Lattice multiplication of 45 x 24

Answer : 1080