Addition using hundred charts and open number lines

On a number chart, what should you do to add 20 to a number?

• hop 2 times to the right

• hop 2 times to the left

• hop 2 times down

• hop 2 times up

On a number chart, what should you do to add 40 to a number?

• hop 4 times to the right

• hop 4 times to the left

• hop 4 times down

• hop 4 times up

On a number chart, what should you do to add 4 to a number?

• hop 4 times to the right

• hop 4 times to the left

• hop 4 times down

• hop 4 times up

To solve the addition 59 + 12 = ________, which number should we mark first on the number chart?

• 59, the larger addend

• 12, the smaller addend

• both are okay!

Fill in the blanks with the correct words:

To add 32 to 49 on a number chart, we should hop 3 times .................. and then 9 times to the ....................

• down, right

• up, left

• down, left

• up, right

To add 31 to 72 on a number chart, we should start with.............

• 31, the larger addend

• 31, the smaller addend

• 72, the smaller addend

• 72, the larger addend

To add 56 to 42 using a number chart, we should move ............. times down and .................. times to the right.

• 4, 2

• 2, 4

• 5, 4

• 2, 6

On a number chart, if we want to add 1, we need to move.................

• to the left

• to the right

• down

• up

On a number chart, if we want to add 10, we need to move.................

• to the left

• to the right

• down

• up

Fill in the blanks in the hundred chart.

• 35 + 3 = 38

• 35 + 30 = 65

• 35 +40 = 75

• 35 + 20 = 55