Maths GRADE 2 Addition and Weeks Subtraction 10

Maths GRADE 2 Addition and Weeks Subtraction 10 -13 Checklist Name __________ Demonstrated Models addition and subtraction of whole numbers. Estimates sums and differences Describes mental and written strategies for adding and subtracting two-digit numbers. - Jump Strategy Eg. Use empty number line, start with one number and then add tens and ones of second number - Split (Decomposition)Strategy Split both numbers into tens and ones. Add tens, add ones, add tens and ones together. - Compensation Strategy Eg. 28+14 Add 2 to 28 and take it away from 14. This becomes 30 + 12 = 42. Uses fast recall of addition and subtraction number facts in real life situations. Selects an appropriate method for solving a problem. Uses strategies to evaluate the reasonableness of answers. Observations

Maths GRADE 2 Addition and Subtraction Weeks 10 -13 – Student Checklist Name __________ I can. . . Model addition and subtraction of whole numbers using Base 10 materials, hundreds charts and number lines. Use the Jump Strategy for Addition Eg. Use an empty number line, start with one number and then add tens and ones of second number. Use the Jump Strategy for Subtraction Use the Split (Decomposition) Strategy for Addition Split both numbers into tens and ones. Add tens, add ones. Add tens and ones together. Use the Split (Decomposition) Strategy for Subtraction Split both numbers into tens and ones. Subtract tens, subtract ones add tens and ones together. Use the Compensation Strategy for Addition Eg. 28+14 Add 2 to 28 and take it away from 14. This becomes 30 + 12 = 42. Use the Compensation Strategy for Subtraction Eg. 28+14

Maths Addition and Subtraction GRADE 2 Name __________ Find the answers to the following addition and subtraction problems. Show you solved the problems. 34 + 23 = 56 -22 = Ruby counted 25 red roses in the garden. She also counted 13 pink ones. How many roses were there altogether? Answer = ______

Maths Addition and Subtraction GRADE 2 Ollie had a box of 75 candies. He gave 42 candies to his friends. How many candies does he have left? Answer = ______ William added two numbers and the answer was 50. What could the two numbers have been? Write all the combinations that you can think of. 50