Page 3 - 预备，起！Praktis GO! MATHEMATICS 4

Name:........................................................................... Class:.............................. Date:.......................

Practice THEME 1
Numbers and Operations

1 Numbers and Operations

Praktis GO! MATHEMATICS 4, 版权所有·侵权必究
SMART NOTES

1. Read out and write the whole number in 4. The estimation of quantity is done based on
words and in numeral. the reference set.
Example:
Numeral : 46 378
Words : Forty-six thousand three hundred P Q
and seventy-eight 50 marbles Estimated
25 marbles
2. A whole number represents a combination of
digits at specific place values and digit values. 5. Rounding off any number from the nearest
Example: The number represented by the ten till the nearest ten thousand.
abacus is 39 858 Example:
Round off 84 239 to the nearest ten thousand.
84 239 80 000

4 is smaller than 5, therefore, digit 8 remains while the
other digits to the right of digit 8 are replaced with 0.
Number Place value Digit value
3 ten thousands 30 000 Round off 26 791 to the nearest hundred.
9 thousands 9 000 26 791 26 800
8 hundreds 800
9 is bigger than 5, therefore, add 1 at the digit
5 tens 50 rounded off and replace the other digits to the
8 ones 8 right of digit 7 with 0.
Partition the number: 6. Identifying a number pattern.
place value: 3 ten thousands + 9 thousands Example:
+ 8 hundreds + 5 tens + 8 ones + 5 + 5 + 5 + 5
digit value: 30 000 + 9 000 + 800 + 50 + 8
12 345, 12 350, 12 355, 12 360, 12 365
3. Even number → a number that can be divided
by 2 with no remainder The number pattern is increasing in fives.
2, 4, 6, 8, 10, … 7. Addition of any two, three or four numbers.
Odd number → a number that can be divided Example:
by 2 with a remainder 14 325 + 331 + 34 252 + 20 040 = 68 948
1, 3, 5, 7, 9, …

1 © Penerbitan Pelangi Sdn. Bhd.

01 Praktis Go Mate T4_p1-10.indd 1 3/12/21 11:34 AM