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Common Core · Grade 1 · Maths · Number & Operations in Base Ten

9 curriculum codes

Maths

Number & Operations in Base Ten

CCSS.MATH.CONTENT.1.NBT.C.4 — opens in a new tab

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

27 resources

Year 1 Addition & Subtraction Story Problems Unit | Worksheets, Games & Assessment

$4.99

Year 1 Addition and Subtraction Problem Solving

$4.99

Year 1 Addition Strategies Unit

$4.99

Year 1 Introduction to Subtraction Variety Pack | 2 Maths Units

$6.99

Year 1 Modelling Money Problems Unit

$4.99

Year 1 Money Unit Variety Pack | 2 Maths Units

$6.99

Year 1 Number Patterns Unit

$4.99

Year 1 Place Value to 120 Unit | Worksheets, Games & Assessment

$4.99

CCSS.MATH.CONTENT.1.NBT.C.5 — opens in a new tab

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

9 resources

Number Sequences Unit – Year 1

$4.99

Numbers to 120 - Year 1 Mathematics Unit

$4.99

Numbers to 50 Year 1 Unit

$4.99

Numbers to 75 Year 1 Unit

$4.99

Place Value to 100 Year 1 Unit

$4.99

Place Value to 120 – Year 1

$4.99

Place Value to 30 Unit

$4.99

Recognise and Order Numbers to 100

$4.99

Year 1 Place Value to 120 Unit | Worksheets, Games & Assessment

$4.99

CCSS.MATH.CONTENT.1.NBT.C.6 — opens in a new tab

Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

20 resources