YEAR 2 Addition Subtraction Add 2 digit numbers

YEAR 2 Addition & Subtraction Add 2 -digit numbers (not crossing 10) Add 2 -digit numbers (crossing 10) Subtract 2 -digits (not crossing 10) Block 2 – Week 7

Lesson 1 Step: Add 2 -digit numbers (not crossing 10) (Practical)

Fluency Use the Base 10 to help you complete the addition calculations: Tens Ones Column addition: + 2 4 3 5 5 9 Number sentence: 5 9 24 + 35 = 59

Fluency Use the Base 10 to help you complete the addition calculations: Tens Ones Column addition: + 3 2 3 4 6 6 Number sentence: 6 6 32 + 34 = 66

Fluency Use the Base 10 to help you complete the addition calculations: Tens Ones Column addition: + 1 5 2 4 3 9 Number sentence: 3 9 15 + 24 = 39

Fluency Use the Base 10 to help you complete the addition calculations: Tens Ones Column addition: + 4 3 2 5 6 8 Number sentence: 6 8 43 + 25 = 68

Practical: Fluency Select a calculation card and build it using equipment. Solve and represent the calculation using column addition and a number sentence.

Fluency Addition problem Column addition 1 8 3 1 4 tens + ______ 9 ones = ______ 49 ______ 4 9 68 26 + 42 = ______ 2 6 4 2 6 8 49 18 + 31 = ______ 8 ones + 1 ones = ______9 ones. 1 ten + 3 tens = ______4 tens. 6 ones + 2 ones = ______8 ones. + + 2 tens + 4 tens = ______6 tens + ______ 8 ones = ______ 68 ______ Part-whole model 49 18 31 68 26 42

Fluency Addition problem Column addition 3 5 2 1 5 tens + ______ 6 ones = ______ 56 ______ 5 6 42 + 57 = ______99 4 2 5 7 9 9 56 35 + 21 = ______ 5 ones + 1 ones = ______6 ones. + 3 tens + 2 tens = ______5 tens. 2 ones + 7 ones = ______9 ones. + Part-whole model 56 35 21 99 4 tens + 5 tens = ______9 tens. 9 tens + ______ 9 ones = ______ 99 ______ 42 57

Reasoning Spot and explain the mistake made. Tens Ones Column addition: + 5 5 1 2 4 3 50 5 The tens column has been completed incorrectly. There are 5 tens (not 50 tens).

Complete the column addition calculations to make them true. A B + 5 4 3 3 8 7 1 + 4 5 How many different ways can B be completed? 8 Problem solving

Lesson 2 Step: Add 2 -digit numbers (crossing 10) (Practical)

Fluency Expanded column addition: Tens Ones + 40 12 Expanded column addition shows the value of each digit. + 2 6 1 3 3 0 4 3

Fluency Compact column addition: Tens Ones + 4 2 Compact column addition shows the exchange of ten ones to one ten. 2 6 1 6 4 2 1

Practical: Select a calculation card and build it using Base 10. Solve the calculation and show this as a column addition. Remember… ten ones can be exchanged for one ten. Fluency

Lesson 3 Step: Add 2 -digit numbers (crossing 10)

Fluency Expanded column addition: Tens Ones Column addition: + + 50 11 3 4 2 7 1 1 5 0 6 1 Number sentence: 34 + 27 = 61

Fluency Expanded column addition: Tens Ones Column addition: + + 50 13 4 5 1 8 1 3 5 0 6 3 Number sentence: 45 + 18 = 63

Fluency Expanded column addition: Tens Ones Column addition: + + 80 15 3 9 5 6 1 5 8 0 9 5 Number sentence: 39 + 56 = 95

Fluency Compact column addition: Tens Ones Column addition: + 5 2 2 7 2 5 5 2 1 Number sentence: 27 + 25 = 52

Fluency Compact column addition: Tens Ones Column addition: + 7 1 4 8 2 3 7 1 1 Number sentence: 48 + 23 = 71

Fluency Complete: Addition problem Column addition 98 33 + 65 = ______ 3 ones + 5 ones = ______8 ones. + 3 3 6 5 9 8 3 tens + 6 tens = ______9 tens + ______ 8 ones = ______ 98 ______ Part-whole model 98 33 65

Fluency Complete: Addition problem Column addition 77 24 + 53 = ______ 4 ones + 3 ones = ______7 ones. + 2 4 5 3 7 7 2 tens + 5 tens = ______7 tens + ______ 7 ones = ______ 77 ______ Part-whole model 77 24 53

Place all four digit cards in the number sentence below. 3 2 5 + 4 = ? What is the largest total you can make? 52 + 43 = 95 What is the smallest total you can make? 25 + 34 = 59 Reasoning

Problem solving 4 tens + 3 ones + 2 tens + ____ ones The missing number of ones is less than 3. List all possible ways of completing the calculation. 43 + 22 = 65 43 + 21 = 64 43 + 20 = 63

Lesson 4 Step: Subtract with 2 -digits (not crossing 10) (Practical)

Fluency Use Base 10 to help you complete the subtraction calculations. 39 – 27 – 54 – 32 – 3 9 2 7 1 2 5 4 3 2 2 2

Fluency Use Base 10 to help you complete the subtraction calculations. 48 – 33 – 69 – 37 – 4 8 3 3 1 5 6 9 3 7 3 2

Practical: Select a calculation card and build it using Base 10. Solve the calculation and show this as a column subtraction. Fluency

Lesson 5 Step: Subtract with 2 -digits (not crossing 10)

Fluency Use Base 10 to help you complete the subtraction calculations. 44 – 21 – 57 – 32 – 4 4 2 1 2 3 5 7 3 2 2 5

Fluency Subtraction problem Column subtraction 5 4 2 3 3 tens – ______ 1 ones = ______ 31 ______ 3 1 45 67 – 22 = ______ 6 7 2 2 4 5 31 54 – 23 = ______ 4 ones – 3 ones = ______1 ones. _ 5 ten – 2 tens = ______3 tens. 7 ones – 2 ones = ______5 ones. _ 4 tens. 6 tens – 2 tens = ______ 4 tens – ______5 ones = ______ 45 ______ Part-whole model 54 31 23 67 22 45

Fluency Addition problem Column addition 7 5 4 3 3 tens – ______2 ones = ______ 32 ______ 3 2 34 89 – 55 = ______ 8 9 5 5 3 4 32 75 – 43 = ______ 5 ones – 3 ones = ______2 ones. _ 7 tens – 4 tens = ______3 tens. 9 ones – 5 ones = ______4 ones. _ 8 tens – 5 tens = ______3 tens – ______4 ones = ______ 34 ______ Part-whole model 75 43 32 89 55 34

I have complete the subtraction calculation correctly. 78 – 3 4 = 43 Is Jack correct? Explain your answer. No, 78 – 34 = 44. The number in the box should be 5 as 78 – 35 = 43.

Jess has 11 marbles. Dom has 35 marbles. Asha has 23 marbles. a) How many more marbles does Asha have than Jess? b) How many more marbles does Dom have than Asha? c) How many more marbles does Dom have than Jess? 23 _ 11 = 12 35 _ 23 = 12 35 _ 11 = 24