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Three-Digit Addition: No Regrouping

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Three-Digit Addition: No Regrouping

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About this activity

Add 3-digit numbers without regrouping.

Created by

Shelly Jain
Shelly Jain
India

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Three-Digit Addition: No Regrouping
 

Three-Digit Addition: No RegroupingOnline version

Add 3-digit numbers without regrouping.

by Shelly Jain
1

What is 123 + 234?

2

What is 200 + 150?

3

What is 400 + 300?

4

What is 111 + 222?

5

What is 500 + 40?

6

What is 305 + 120?

7

What is 240 + 150?

8

What is 321 + 100?

9

What is 128 + 200?

10

What is 123 + 255?

11

What is 47 + 26 when added vertically?

12

Compute 128 + 57 via vertical addition.

13

Find the sum of 264 and 389.

14

Vertical addition: 509 + 86 = ?

15

Compute 123 + 77 by vertical addition.

16

What is 305 + 420 using vertical addition?

17

Calculate 999 + 1 vertically.

18

Find 246 + 158 in vertical sum.

19

Compute 812 + 199 vertically.

20

Vertical addition: 600 + 75 equals?

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Units:3+4=7; Tens:2+3=5; Hundreds:1+2=3; total 357.

Units:0+0=0; Tens:0+5=5; Hundreds:2+1=3.

Hundreds sum:4+3=7; tens and units are 0.

Each digit adds to 3: 1+2,1+2,1+2.

Tens:0+4=4; Hundreds:5+0=5; Units:0+0=0.

Hundreds:3+1=4; Tens:0+2=2; Units:5+0=5.

Hundreds:2+1=3; Tens:4+5=9; Units:0+0=0.

Units:1+0=1; Tens:2+0=2; Hundreds:3+1=4.

Units:8+0=8; Tens:2+0=2; Hundreds:1+2=3.

Units:3+5=8; Tens:2+5=7; Hundreds:1+2=3.

Carry from units: 7+6=13, write 3, carry 1; tens: 4+2+1=7.

Units 8+7=15 → 5, carry 1; tens 2+5+1=8; hundreds 1+0=1 → 185.

Units 4+9=13 → 3, carry 1; tens 6+8+1=15 → 5, carry 1; hundreds 2+3+1=6.

Units 9+6=15 → 5, carry 1; tens 0+8+1=9; hundreds 5+0=5.

Units 3+7=10 → 0, carry 1; tens 2+7+1=10 → 0, carry 1; hundreds 1+0+1=2.

Units 5+0=5; tens 0+2=2; hundreds 3+4=7 → 725.

Units 9+1=10 → 0, carry 1; tens 9+0+1=10 → 0, carry 1; hundreds 9+0+1=10 → 0, carry 1; thousands 1.

Units 6+8=14 → 4, carry 1; tens 4+5+1=10 → 0, carry 1; hundreds 2+1+1=4.

Units 2+9=11 → 1, carry 1; tens 1+9+1=11 → 1, carry 1; hundreds 8+1+1=10 → 0, carry 1; thousands 1.

Units 0+5=5; tens 0+7=7; hundreds 6+0=6 → 675.

 
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