Subtraction Within 100 - Column Subtraction

Name: ใบงานการลบไม่เกิน 100 ลบแบบตั้ง
SKU: MTH-12-B1-1
Price: 19.00 THB
Availability: InStock

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Cover artwork for Subtraction Within 100 - Column Subtraction, Grades 1-3

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Worksheet details

CategoryNumbers and Algebra

Grade bandGrades 1–3 (P.1–P.3)

Difficulty2 / 5

Activity formatFill in the blank

Worksheet codeMTH-12-B1-1

File typePDF

Content languageEnglish + Thai

Price19 Baht

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The preview is watermarked and lower resolution than the file you receive.

Subtraction Within 100 - Column Subtraction

Mathematics Numbers and Algebra worksheets on Subtraction Within 100 for Grades 1–3 (P.1–P.3), difficulty 2/5. PDF, downloadable as soon as payment clears.

Curriculum indicators practised

Linked curriculum indicators

ค 1.1 ป.1/4Find the value of the unknown in addition and subtraction number sentences involving counting numbers up to 100 and 0

Before you begin

Teaching guide

What children will practise

Subtract two-digit numbers in a tens-and-ones grid, both without regrouping and by exchanging 1 ten for 10 ones.

What's in the worksheet

10 questions, 20 points - Questions 1-5 need no regrouping, e.g. 54 - 21 = 33 and 96 - 54 = 42 - Questions 6-10 need 1 ten exchanged for 10 ones, with a box to note the exchange, e.g. 42 - 18 = 24 and 92 - 57 = 35 - Problems are printed in Thai numerals; answers go in the result box - A separate answer key is included

How to use it in class

Use after regrouping in subtraction has been modelled with tens rods. Allow about 15-20 minutes. - Work question 6 together with real tens rods so children see 4 tens become 3 tens after the exchange - Have children check answers by adding back, e.g. 24 + 18 should give 42

Common sticking points

- Always taking the smaller ones digit from the larger, e.g. 42 - 18 = 36 by doing 8 - 2 - Exchanging a ten but not reducing the tens digit, e.g. 61 - 27 = 44 instead of 34 - Reversing the digits when copying the answer from the grid into the result box

Teaching ideas

Teaching Addition and Subtraction in Grades 1 to 3, One Step at a Time

Six steps for teaching addition and subtraction in Grades 1 to 3, from bonds to ten to carrying and borrowing, plus common mistakes and quick checks.

A PDF written to the Thai curriculum. Buy this worksheet once and keep it; no monthly plan is required.

What you get

Download it as soon as payment clears. The link stays in your account, so you can fetch the file again whenever you need it.

A print-ready A4 PDF, without the watermark
Instructions and content in one file, nothing to download separately
A private download link, kept in your account
Unlimited reprints for your own classroom

Ready for your next lesson

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