Mental math addition

​How to add numbers easily!

Add 730 + 520

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Add the hundreds first, 700+500=1200

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Then add 30+20= 50

So the total is 1200+50=1250​

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Add 130 and 450

steps :

1. 100+400=500

2. 30+50=80

3. 500+80=580​

1. 410+890

2. 520+330

3. 480+310

4. 590+630

5. 440+580

6. 870+590

7. 640+390

8. 780+690

9. 570+540

10. 330+660

11. 650+480

12. 590+480

13. 730+850

14. 860+370