RAKA mentally add multiples of 10 and 100 to a number

LO: To mentally add multiples of 10 and 100 to a number.

KMRM- On WB

Adding multiples of 10
24 + 30
mentally add the tens first
24 + 30 = 24 + 10 + 10 + 10

So in your head you go:

​24	​
​	​+10
​34	​
​	​+10
​44	​
​	​+10
​54	​Answer

​Remember the tens place changes while the ones place stays the same

Adding multiples of 100
424 + 300
mentally add the hundreds first
424 + 30 = 424 + 100 + 100 + 100

So in your head you go:

​424	​
​	​+100
​524	​
​	​+100
​624	​
​	​+100
​724	​Answer

​Remember the hundreds place changes while the ones and tens place stays the same

Fill in the Blanks

45 + 20?

Fill in the Blanks

67 + 30?

Fill in the Blanks

What is 124 + 200?

Fill in the Blanks

150 + 200?

Fill in the Blanks

60 + 40?

Fill in the Blanks

370 + 500?

Open Ended

Explain how you would mentally 23 + 40

Open Ended

Explain how you would mentally 145 + 300