Worksheet: Adding Tens to Three-Digit Numbers

In this worksheet, we will practice modeling adding a multiple of ten to a three-digit number and investigate which digits in the number change.

Q1:

Count in tens to find the sum.

Q2:

If the price of a meter of cloth is 10 LE, what is the price of 762 meters?

Q3:

Complete the following: t e n s t w e n t y t e n s t h i r t y - o n e t e n s + = , + 2 0 0 = 3 1 0 .

  • Atwelve, 120
  • Beleven, 110
  • Cfourteen, 140
  • Dthirteen, 130

Q4:

One metre of cloth costs 107 LE. Find the price of 2 m and the price of 20 m.

  • A 2 m cost 34 LE, 20 m cost 340 LE.
  • B 2 m cost 107 LE, 20 m cost 1,070 LE.
  • C 2 m cost 214 LE, 20 m cost 2,140 LE.
  • D 2 m cost 1,564 LE, 20 m cost 15,640 LE.
  • E 2 m cost 109 LE, 20 m cost 127 LE.

Q5:

Look at how Daniel broke apart a number to help him add.

First, add the tens: 6 0 + 3 0 = .

Then, add the tens to 204 to find 2 6 4 + 3 0 .

Q6:

Find the sum by adding the tens first.

Q7:

Look at how Natalie broke apart a number to help her add.

First, add the tens.

3 0 + 4 0 = .

Then, add to find the total.

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