Kursus dan Bimbingan Belajar

Jumat, 17 April 2026

Mental Math Multiply Between 11 And 19

Example One

19 × 15 = ...

First Step

Sum of first addend number with ones of second addend number.

19 + 5 = 24

Second Step

Add zero at the last digit of the sum number from first step. Because more than tens number multiply with more than tens number equal hundred.

19 + 5 = 240

Third Step

Multiplying ones digit from each addend.

9 × 5 = 45

Fourth Step

Adding the sum number from second step with the sum number from third step.

240 + 45 = 285

Example Two

Practice by yourself of this example!

18 × 14 = ...

Bibliography

https://www.splashlearn.com/

https://www.twinkl.com/

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Rabu, 15 April 2026

Mental Math In Subtraction Rounding Base Ten Form Number

Previous Requirement Lessons

Basic Number Operation Vocabulary 1

Number Place Value In Mathematics

Example ( Find The Difference Number )

55 - 19 = ...

Minuend number ( top digit ) in this example is 55.
Subtraction sign is ( - ).
Subtrahend number ( lower digit ) in this example is 19.
Difference number in this example is ( ... )

First Step

Rounding the subtrahend number to the nearest tens of base ten form number. In this example we rounding 19 to 20. Then keep in the mind the additional number is 1.

55 - ( 19 + 1 ) = ...

55 - 20 = ...

Second Step

Subtract the subtrahend number from the minuend number to get difference number. In this example 20 ( subtrahend number ) from 55 ( minuend number ).

55 - 20 = 35

Third Step

Add the difference number by additional number from First Step. In this example add 35 to 1.

55 - 20 = 35 + 1

55 - 20 = 36

Fourth Step

Return the subtrahend number as the number in the question. In this example the subtrahend number return from 20 to 19.

55 - 19 = 36

Bibliography

https://byjus.com/

https://www.ck12.org/

https://www.mathnasium.com/

https://www.splashlearn.com/

Selasa, 14 April 2026

Mental Math In Multiplication By Nine

Previous Requirement Lessons

Number Place Value In Mathematics

Number Place Value

Basic Number Operation Vocabulary 1

Vertical Subtraction ( with regrouping ).

Multiplication in mathematics is using the repeated addition. Multiples of 9 are any number you get ( the products ) from multiplying 9 with integer ( whole number ).

Multiple 1 To 10 With Nine

Question

1 × 9 = ...
2 × 9 = ...
3 × 9 = ...
4 × 9 = ...
5 × 9 = ...
6 × 9 = ...
7 × 9 = ...
8 × 9 = ...
9 × 9 = ...
10 × 9 = ...

First Step

Write 0 at the left of multiplier number.

01 × 9 = ...

Second Step

Write 0 in the result ( at the right side of equal sign notation ) because every number multiple by 0 get zero. This zero number place in the tens number place value.

01 × 9 = 0 ...

Third Step

Multiply the multiplier number with multiplicand number. Write the nine.

01 × 9 = 09

Fourth Step

Write 0 at the left of multiplier number. in the second row result, write a number after the number from the previous row ( that is 1 ) as tens number place value. Then write a number before the number from the previous row ( that is 8 ) as ones number place value. So the result is eighteen.

01 × 9 = 09

02 × 9 = 18

Fifth Step

Write 0 at the left of multiplier number. in the third row result, write a number after the number from the previous row ( that is 2 ) as tens number place value. Then write a number before the number from the previous row ( that is 7 ) as ones number place value. So the result is twenty seven.

01 × 9 = 09

02 × 9 = 18

03 × 9 = 27

Next Step

Repeat the fifth step until all question rows is finished.

01 × 9 = 09

02 × 9 = 18

03 × 9 = 27

04 × 9 = 36

05 × 9 = 45

06 × 9 = 54

07 × 9 = 63

08 × 9 = 72

09 × 9 = 81

10 × 9 = 90

Result

Erase each zero in the first digit of multiplier.

1 × 9 = 9

2 × 9 = 18

3 × 9 = 27

4 × 9 = 36

5 × 9 = 45

6 × 9 = 54

7 × 9 = 63

8 × 9 = 72

9 × 9 = 81

10 × 9 = 90

Multiply Every Digit With Nine

Example

27 × 9 = ...

Number factor are:

Multiplicand number is 27.
Multiplier number is 9.

The mental math steps:

Multiply the number by 10:
27 × 10 = 270
Subtract the result number from previous step by the original number ( multiplicand number ).
270 - 27 = 243

Bibliography

https://byjus.com/

https://www.ck12.org/

https://www.splashlearn.com/

https://www.vedantu.com/

Elementary School Lesson

Subject Topics Of Math

Install Google Docs

Open Google Play Store.
At the search bar ( bottom position ), tap labels "Search".
Type "Office Suite" on the "Search apps & games" edit text box.
After the result appeared. Swap to the bottom if need it. Tap the " Google Docs" app.
Tap "Install" button.
Wait for installation process.
Tap open button.
Then Google Docs is ready to operate.

Notes

If you’re having trouble downloading apps from the Google Play Store, follow these steps to fix the issue.

Check that your Wi-Fi is stable.
Check the storage space on your device is enough.

Check for system updates on your device.
If you still can’t download apps in the Play Store, you can learn from https://support.google.com/store.

This lesson does not always update to the most recent update. Then you may get the more updates lesson in other resources.

<< back to Study About Google Docs Suite

Senin, 13 April 2026

Memulai WhatsApp 1

Tujuan Pembelajaran:

Setelah siswa memulai belajar WhatsApp,

* Siswa Dapat Mendownload dan Menginstall WhatsApp.

* Siswa Dapat Mendaftar Dan Memverifikasi Nomor Telepon.

* Siswa Dapat Mengatur Profil WhatsApp.

* Siswa Dapat Memberikan Izin Akses.

* Siswa Dapat Mulai Chat.

* Siswa Dapat Bergabung Dengan Grup.

Mendownload Dan Menginstall WhatsApp

Buka Google Play Store.
Beberapa langkah berikut ini digunakan untuk menemukan WhatsApp. Mari kita mulai dengan tap di bagian tab labels "Top charts",
lalu tap kotak spinner "Categories",
swap ke bawah jika perlu, lalu tap list item "Communication".
Temukan WhatsApp, jika perlu swap ke bawah dan tap "WhatsApp Messenger".
Tap tombol "Install".
Tunggu proses install.
Setelah proses instalasi selesai, tap tombol "Open".
tap tombol "Agree and continue".
Lalu pada "Allow WhatsApp to send you notifications?", tap tombol "Allow".
Input nomor telepon tanpa nomor 0 (dari posisi paling depan) pada kotak text edit "Phone Number",
tap tombol "Next"
tap tombol "Yes", jika nomor telepon sudah diinput dengan benar.
pada card view "Contacts" tap tombol "Continue".
tap tombol "Allow"
pada card view "Verified", tap tombol "Continue".
pada card view "Media", tap tombol "Continue".
tap tombol "Allow".
tap tombol "Allow all".
input nama di kotak edit "Type your name here", upload foto, lalu tap tombol "Next".
siap untuk melakukan chat.