Question

Use shortcut method to evaluate
(i) 318+9
(ii) 318+99
(iii) 318+999​

Answer 1

Answer:

1. 318 + 9 = 317 + 1 + 9 = 317 + 10 = 327

or,

318 + 9 = 318 + 10 - 1 = 327

2. 318 + 99 = 318 + 100 - 1 = 418 - 1 = 417

3. 318 + 999 = 318 + 1000 - 1 = 1318 - 1 = 1317

Step-by-step explanation: