Math 12.2

Math 12.2

Second Grade

Multiple Choice

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Steve has 15 baseball cards. He gives 7 baseball cards to Evan. How many baseball cards does Steve have now?

• 8

• 22

Today we will work regrouping for subtraction

• Everyone needs to draw a place value chart with ones and tens

• We will use longs to represent tens and cubes to represent ones

Let's try one together: Ms. Heath has 18 pencils, 9 of her students need one. How many pencils does she have left?

• Make a place value chart and label the ones and tens

• Use longs to represent tens and cubes to represent ones

Multiple Choice

Elena has 42 pennies in a jar.She gives 14 pennies to Mark. How many pennies does Mark have left?

A. How can you show 42 on the place value chart

• 5 longs and 2 cubes

• 4 longs and 2 cubes

Multiple Choice

Elena has 42 pennies in a jar.She gives 14 pennies to Mark. How many pennies does Mark have left?

B. Are there enough ones to subtract 4 ones?

• no

• yes

Multiple Choice

How can you regroup 1 ten as 10 ones?

• I can add ten cubes.

• I can take 1 long from the tens place and make it 10 cubes and put them in the ones place.

Multiple Choice

C. Subtract 4 ones from 12 ones. How many ones are left?

• 10

• 8

Multiple Choice

Subtract 1 ten from 3 tens. How many tens are left?

• 4

• 2

Multiple Choice

How many pennies does Elena have left?

• 28

• 15

Let's try some more

Ethan has 28 marbles . He gives Zephaniah 9 marbles. How many marbles does Ethan have left?