Subtracting Two-Digit Numbers with Base 10 Pictures

Year 2 MathsAddition and Subtraction4 pages

About this worksheet

Fourteen Year 2 subtraction calculations over three pages, plus one reasoning question. On page 1, pupils use base 10 pictures for four calculations with no exchange, from 46 - 21 to 79 - 52. Page 2 has four that need an exchange, such as 61 - 34, and each picture already shows one ten crossed out with ten ones drawn beside the ones. Page 3 drops the pictures. It has six calculations with a box for working, including the missing number in ___ + 24 = 60, then asks how many tens and ones Sam has after exchanging in 63 - 27. An answer key is included.

Page 1 of 4

When this preview is focused, use the left and right arrow keys to move between pages.

Curriculum objectives covered

Number - addition and subtraction

โ€œAdd and subtract numbers using concrete objects, pictorial representations, and mentally, including: two two-digit numbersโ€

Pages 1 and 2 use base 10 pictures for calculations from 46 - 21 to 74 - 48, and page 3 asks for the same kind of calculation mentally.

Number - addition and subtraction

โ€œRecognise and use the inverse relationship between addition and subtraction and use this to check calculations and solve missing number problemsโ€

Page 3 question 6, ___ + 24 = 60, is solved by working out 60 - 24.

What's inside this worksheet

Subtracting Without an Exchange

Four calculations, such as 58 - 35 and 67 - 43, each beside a picture of the first number in tens and ones. Pupils count what is there and take away.

Subtracting With an Exchange

Four calculations from 42 - 15 to 74 - 48. In every picture one ten is shaded and crossed out, and ten loose ones sit next to the ones already there.

Beat the Clock

Six calculations without pictures, including 91 - 46 and ___ + 24 = 60, each with a box for jottings. Question 7 asks how many tens and ones Sam has once he exchanges a ten in 63 - 27.

Answers

Every answer by section, ending with 5 tens and 13 ones for Sam.

How teachers use it

Before you teach exchange

Do page 1 with real base 10 equipment on the tables. Pupils who manage 46 - 21 and 79 - 52 easily are ready for the crossed-out tens on page 2.

Talk through one picture

Put 42 - 15 from page 2 on the board and ask why one ten is crossed out. Let pupils explain where the ten extra ones came from before they try the other three.

Exit question

Give Sam's question about 63 - 27 on its own at the end of the lesson. An answer of 6 tens and 3 ones tells you the pupil has not yet made the exchange.

Get started today

Create your own lesson plans, worksheets, and classroom activities in minutes using our AI-powered tools.

Try Chalkie for free