Barr Primary and Early Years Centre

Addition and Subtraction

Estimation and rounding
I can use my knowledge of rounding to routinely estimate the answer to a problem then, after calculating, decide if my answer is reasonable, sharing my solution with others.
MNU 2-01a

Number and number processes
Having determined which calculations are needed, I can solve problems involving whole numbers using a range of methods, sharing my approaches and solutions with others.
MNU 2-03a

I have explored the contexts in which problems involving decimal fractions occur and can solve related problems using a variety of methods.

MNU 2-03b

Adding two 3-digit numbers (without regrouping) – https://classroom.thenational.academy/lessons/adding-two-3-digit-numbers-without-regrouping-c4uk8r

Subtracting two 3-digit numbers (without regrouping) – https://classroom.thenational.academy/lessons/subtracting-two-3-digit-numbers-without-regrouping-60r3cc

Adding two 3-digit numbers (regrouping in one column) – https://classroom.thenational.academy/lessons/adding-two-3-digit-numbers-regrouping-in-one-column-cmt64e

Adding two 3-digit numbers (regrouping in multiple columns) – https://classroom.thenational.academy/lessons/adding-two-3-digit-numbers-regrouping-in-multiple-columns-74u3ce

Subtracting 3-digit numbers (regrouping tens to ones) – https://classroom.thenational.academy/lessons/subtracting-3-digit-numbers-regrouping-tens-to-ones-cgwk8t

Subtracting 3-digit numbers (regrouping hundreds to tens) – https://classroom.thenational.academy/lessons/subtracting-3-digit-numbers-regrouping-hundreds-to-tens-c9h66t

Subtracting 3-digit numbers (regrouping in multiple columns) – https://classroom.thenational.academy/lessons/subtracting-3-digit-numbers-regrouping-in-multiple-columns-74rkce

Solving addition and subtraction word problems – https://classroom.thenational.academy/lessons/solving-addition-and-subtraction-word-problems-6mw3ct

Solving word problems with unknown values – https://classroom.thenational.academy/lessons/solving-word-problems-with-unknown-values-cgtpcd

Deriving addition and subtraction facts – https://classroom.thenational.academy/lessons/deriving-addition-and-subtraction-facts-6xk30t

Deriving addition and subtraction facts by using given calculations – https://classroom.thenational.academy/lessons/deriving-addition-and-subtraction-facts-by-using-given-calculations-cru3jd

Choosing appropriate addition strategies – https://classroom.thenational.academy/lessons/choosing-appropriate-addition-strategies-6wwkad

Choosing appropriate subtraction strategies – https://classroom.thenational.academy/lessons/choosing-appropriate-subtraction-strategies-6nh3gc

Applying and consolidating: Related number facts and appropriate strategies – https://classroom.thenational.academy/lessons/applying-and-consolidating-related-number-facts-and-appropriate-strategies-6dgkct

Adding using the column method – https://classroom.thenational.academy/lessons/adding-using-the-column-method-cmw3cc

Adding using the column method, when multiple columns require regrouping – https://classroom.thenational.academy/lessons/adding-using-the-column-method-when-multiple-columns-require-regrouping-cmwpcr

Subtracting using the column method – https://classroom.thenational.academy/lessons/subtracting-using-the-column-method-6mr38r

Subtracting using the column method, when multiple columns require regrouping – https://classroom.thenational.academy/lessons/subtracting-using-the-column-method-when-multiple-columns-require-regrouping-6xh34c

Subtracting from multiples of 1000 – https://classroom.thenational.academy/lessons/subtracting-from-multiples-of-1000-64rkjr

Applying and consolidating: Column method for addition and subtraction – https://classroom.thenational.academy/lessons/applying-and-consolidating-column-method-for-addition-and-subtraction-cgvpcc

Representing one-step word problems – https://classroom.thenational.academy/lessons/representing-one-step-word-problems-6mt3ad

Representing comparison word problems – https://classroom.thenational.academy/lessons/representing-comparison-word-problems-c9hkgr

Solving two-step word problems – https://classroom.thenational.academy/lessons/solving-two-step-word-problems-69k3gr

Applying and consolidating: Word problems and bar models – https://classroom.thenational.academy/lessons/applying-and-consolidating-word-problems-and-bar-models-70rkcc

Using and explaining addition strategies – https://classroom.thenational.academy/lessons/using-and-explaining-addition-strategies-60t6ce

Using and explaining addition and subtraction strategies – https://classroom.thenational.academy/lessons/using-and-explaining-addition-and-subtraction-strategies-6hk38c

Adding and subtracting using multiples of 10, 100, 1000, 10 000 and 100 000 – https://classroom.thenational.academy/lessons/adding-and-subtracting-using-multiples-of-10-100-1000-10-000-and-100-000-60upcc

Adding and subtracting using the ’round and adjust’ strategy – https://classroom.thenational.academy/lessons/adding-and-subtracting-using-the-round-and-adjust-strategy-chk64e

Adding and subtracting using partitioning – https://classroom.thenational.academy/lessons/adding-and-subtracting-using-partitioning-61h3cd

Rounding to estimate – https://classroom.thenational.academy/lessons/rounding-to-estimate-ccr62d

Adding using the column method – https://classroom.thenational.academy/lessons/adding-using-the-column-method-6wt64c

Subtracting using the column method – https://classroom.thenational.academy/lessons/subtracting-using-the-column-method-6xj32d

Problem solving using the column method – https://classroom.thenational.academy/lessons/problem-solving-using-the-column-method-c8up6c

Solving multi-step addition and subtraction problems – https://classroom.thenational.academy/lessons/solving-multi-step-addition-and-subtraction-problems-ctk66d

Deriving decimal addition and subtraction facts – https://classroom.thenational.academy/lessons/deriving-decimal-addition-and-subtraction-facts-6gu30c

Adding decimals – https://classroom.thenational.academy/lessons/adding-decimals-70t62r

Subtracting decimals – https://classroom.thenational.academy/lessons/subtracting-decimals-69jpat

Applying mental calculation strategies to adding and subtracting decimals – https://classroom.thenational.academy/lessons/applying-mental-calculation-strategies-to-adding-and-subtracting-decimals-cgr3ce

Solving problems with decimals using addition and subtraction – https://classroom.thenational.academy/lessons/solving-problems-with-decimals-using-addition-and-subtraction-6gu6ad

Addition and Subtraction – https://whiterosemaths.com/homelearning/year-5/week-4/

Addition and Subtraction – https://whiterosemaths.com/homelearning/year-5/week-5/

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