T1 CH1 Numbers Maths - T1 CH1 Numbers

Multiplication by __________ leaves a number unchanged

Division by __________ is not defined

The difference between the smallest natural number and the smallest whole number is _____________

17 × __________ = 34 × 17

When __________ is added to a number, it remains the same

Which of the following expressions is not zero?

The whole number that does not have a predecessor is

The product of a non-zero whole number and its successor is always

(53 + 49) × 0 is

Multiplication is distributive over addition for whole numbers

Both addition and multiplication are commutative for whole numbers

0 is the identity for multiplication of whole numbers

Sum of two whole numbers is always less than their product

Both addition and multiplication are associative for whole numbers

Try to open my locked suitcase which has the biggest 5 digit odd number as the password comprising the digits 7, 5, 4, 3 and 8. Find the password

Name the property being illustrated given below.
50 × 1 = 50

Name the property being illustrated given below.
75 + 34 = 34 + 75

Name the property being illustrated given below.
(12 × 4) × 8 = 12 × (4 × 8)

Name the property being illustrated given below.
50 + 0 = 50

A Music concert is taking place in a stadium. A total of 7,689 chairs are to be put in rows of 90.
(i) How many rows will there be?
(ii) Will there be any chairs left over?

Anbu asks Arivu Selvi to guess a five-digit odd number. He gives the following hints.

• The digit in the 1000s place is less than 5
• The digit in the 100s place is greater than 6
• The digit in the 10s place is 8

What is Arivu Selvi answer? Does she give more than one answer?

A poultry has produced 15472 eggs and fits 30 eggs in a tray. How many trays do they need?

Mullaikodi has 25 bags of apples. In each bag there are 9 apples. She shares them equally amongst her 6 friends. How many apples do each get? Are there any apples left over?

Find the 5 or 6 or 7 digit numbers from a newspaper or a magazine to get a rounded number to the nearest ten thousand

Round off the seven-digit number 29,75,842 to the nearest lakhs and ten lakhs. Are they the same?

Name the property being illustrated given below.
50 × 42 = 50 × 40 + 50 × 2

Estimate by rounding off the number to the nearest hundred.
8074 + 4178

Estimate by rounding off the number to the nearest hundred.
1768977 + 130589

Estimate the sum of 157826 and 32469 rounded off to the nearest ten thousand

Read the table and answer the following questions.

Name of the Star	Diameter (in miles)
Sun	864730
Sirius	1556500
Canopus	25941900
Alpha Centauri	1037700
Arcturus	19888800
Vega	2594200

(i) Write the Canopus star’s diameter in words, in the Indian and the International System.
(ii) Write the sum of the place values of 5 in Sirius star’s diameter in the Indian System.
(iii) Eight hundred sixty-four million seven hundred thirty. Write in Indian System.
(iv) Write the diameter in words of Arcturus star’s in the International System
(v) Write the difference of the diameters of Canopus and Arcturus stars in the Indian and the International Systems

Study the following table and answer the questions

Year	No. of Tigers
1990	3500
2008	1400
2011	1706
2014	2226

(i) How many tigers were there in 2011?
(ii) How many tigers were less in 2008 than in 1990?
(iii) Did the number of tigers increase or decrease between 2011 and 2014? If yes, by how much?

As per the census of 2001, the population of four states are given below. Arrange the states in ascending and descending order of their population.

State	Population
Tamil Nadu	72147030
Rajasthan	68548437
Madhya Pradesh	72626809
West Bengal	91276115

The heights (in metres) of the mountains in Tamil Nadu are as follows:

SI. No	Mountains	Height (in metres)
1	Doddabetta	2637
2	Mahendragiri	1647
3	Anamudi	2695
4	Velliangiri	1778

(i) Which is the highest mountain listed above?
(ii) Order the mountains from the highest to the lowest.
(iii) What is the difference between the heights of the mountains Anamudi and Mahendragiri?