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INDEXED BY:
This work is licensed under a Creative Commons Attribution 4.0 International License.
CSRID Journal Editor's Office:
Universitas Potensi Utama. Jl. K.L. Yos Sudarso Km 6,5 No.3-A Telp. (061) 6640525 Ext. 214 Tanjung Mulia Medan 20241
basic rule
oleh Wiliam Versley (2019-06-26)
Here’s a basic rule to subtract number from 1,000: Subtract every number except the last from 9 and subtract the final number from 10
For example:
1,000 – 556
Step 1: Subtract 5 from 9 = 4
Step 2: Subtract 5 from 9 = 4
Step 3: Subtract 6 from 10 = 4
The answer is 444.