Question

Add the numbers 197,203 and 423 in two ways ​fast​

Answer 1

Collumn method

197
203
423
——
823

Method two:

Add the hundreds first:

100+200+400=700

Then add the tens:

700+90+20=810

Then add the 1s:

810+7+3+3=823

HOPE I HELPED!

Answer 2

823

Method 1

Break the three numbers into hundreds, tens and units, then add these separately (starting with the units)

197 = 1 hundred, 9 tens, 7 units

203 = 2 hundreds, 0 tens, 3 units

423 = 4 hundreds, 2 tens, 3 units

Units: 7 + 3 + 3 = 13

Tens: 9 + 2 = 11 tens = 110

Hundreds: 1 + 2 + 4 = 7 hundreds = 700

Add these together: 700 + 110 + 13 = 823

Method 2

First add 203 to 197:

Borrow the 3 from 203 and add it to 197: 197 + 3 = 200

Add the remaining 200: 200 + 200 = 400

Now add 423 to 400: 400 + 423 = 823

⇒ 203 + 197 + 423 = (203 + 197) + 423

= 400 + 423

= 823