**New Vocabulary:** thirteen (13), fourteen (14), fifteen (15), sixteen (16), seventeen (17).

Ten plus three is thirteen. :: 10 + 3 = 13

Ten plus four is fourteen. :: 10 + 4 = 14

Ten plus five is fifteen. :: 10 + 5 = 15

Ten plus six is sixteen. :: 10 + 6 = 16

Ten plus seven is seventeen. :: 10 + 7 = 17

What is thirteen minus ten? :: Three. Thirteen minus ten is three.

What is fourteen minus ten? :: Four. Fourteen minus ten is four.

What is fifteen minus ten? :: Five. Fifteen minus ten is five.

What is sixteen minus ten? :: Six. Sixteen minus ten is six.

What is seventeen minus seven? :: Ten. Seventeen minus seven is ten.

**New Vocabulary:** eighteen (18), nineteen (19), twenty (20), is equal to, yes, no, not.

Is seven plus six equal to thirteen? :: Yes. Seven plus six is equal to thirteen. 7 + 6 = 13

Is twelve plus two equal to fourteen? :: Yes. Twelve plus two is equal to fourteen. 12 + 2 = 14

Is nine plus nine equal to eighteen? :: Yes. Nine plus nine is equal to eighteen. 9 + 9 = 18

Is nine plus ten equal to nineteen? :: Yes. Nine plus ten is equal to nineteen. 9 + 10 = 19

Is fifteen plus five equal to twenty? :: Yes. Fifteen plus five is equal to twenty. 15 + 5 = 20

Is twenty minus 13 equal to seven? :: Yes. Twenty minus 13 is equal to seven. 20 – 13 = 7

Does nineteen minus fourteen equal five? :: Yes. Nineteen minus fourteen equals five. 19 – 14 = 5

Does eighteen minus seven equal eleven? :: Yes. Eighteen minus seven equals eleven. 18 – 7 = 11

Does seventeen minus eight equal nine? :: Yes. Seventeen minus eight equals nine. 17 – 8 = 9

Is twenty minus seventeen equal to three? :: Yes. Twenty minus seventeen is equal to three. 20 – 17 = 3

Does eighteen minus six equal eleven? :: No. Eighteen minus six does not equal eleven. Eighteen minus six is twelve.

Does seventeen minus seven equal nine? :: No. Seventeen minus seven does not equal nine. Seventeen minus seven is ten.

Is nineteen minus three equal to fifteen? :: No. Nineteen minus three is not equal to fifteen. Nineteen minus three is sixteen.

Is fifteen plus four equal to eighteen? :: No. Fifteen plus four is equal to nineteen.

Is fourteen plus five equal to twenty? :: No. Fourteen plus five is equal to nineteen.

Does eight plus eight equal fifteen? :: No. Eight plus eight equals sixteen.

Is eighteen plus two equal to nineteen? :: No. Eighteen plus two is twenty.

**New Vocabulary:** twenty-one (21), twenty-two (22), twenty-three (23), twenty-four (24), twenty-five (25).

Twenty plus one is twenty-one. :: 20 + 1 = 21

Twenty plus two is twenty-two. :: 20 + 2 = 22

Twenty plus three is twenty-three. :: 20 + 3 = 23

Twenty plus four is twenty-four. :: 20 + 4 = 24

Twenty plus five is twenty-five. :: 20 + 5 = 25

Twenty-one minus twenty is one. :: 21 – 20 = 1

Twenty-two minus twenty is two. :: 22 – 20 = 2

Twenty-three minus twenty is three. :: 23 – 20 = 3

Twenty-four minus twenty is four. :: 24 – 20 = 4

Twenty-five minus twenty is five. :: 25 – 20 = 5

Does ten plus eleven make twenty-one? :: Yes. Ten plus eleven makes twenty-one.

Does eleven plus eleven make twenty-two? :: Yes. Eleven plus eleven makes twenty-two.

Is thirteen plus ten equal to twenty-three? :: Yes. Thirteen plus ten equals twenty-three.

Is fourteen plus ten equal to twenty-four? :: Yes. Fourteen plus ten equals twenty-four.

Does fifteen plus ten equal twenty-five? :: Yes. Fifteen plus ten equals twenty-five.

Is twenty-five minus zero equal to twenty-five? :: Yes. Twenty-five minus zero equals twenty-five.

What is nine plus nine? :: Nine plus nine is eighteen.

What is seven plus fourteen? :: Seven plus fourteen is twenty-one.

What is twenty-one minus fifteen? :: Twenty-one minus fifteen is six.

What is twenty-two minus thirteen? :: Twenty-two minus thirteen is nine.

What is twenty-three plus one? :: Twenty-three plus one is twenty-four.

What is twenty-four minus eight? :: Twenty-four minus eight is sixteen.

Does sixteen plus eight equal twenty-five? :: No. Sixteen plus eight does not equal twenty-five. Sixteen plus eight equals twenty-four.

Is seventeen plus three equal to eighteen? :: No. Seventeen plus three is not equal to eighteen. Seventeen plus three is equal to twenty.

Is nineteen minus one seventeen? :: No. Nineteen minus one is not seventeen. Nineteen minus one is eighteen.

Does thirteen minus one equal fourteen? :: No. Thirteen minus one does not equal fourteen. Thirteen minus one equals twelve.

Does twenty-one minus fifteen equal seven? :: No. Twenty-one minus fifteen does not equal seven. Twenty-one minus fifteen equals six.

Is eleven plus ten equal to twenty-two? :: No. Eleven plus ten is not equal to twenty-two. Eleven plus ten is equal to twenty-one.

**New Vocabulary:** less than, greater than.

One is less than two. 1 < 2

Two is greater than one. 2 > 1

Twenty-three is less than twenty-four. :: 23 < 24

Sixteen is less than twenty. :: 16 < 20

Twenty-two is less than twenty-three. :: 22 < 23

Twenty-four is greater than fifteen. :: 24 > 15

Sixteen is greater than fifteen. :: 16 > 15

Twenty-three is greater than twenty-two. :: 23 > 22

Is seventeen less than twenty-two? :: Yes. Seventeen is less than twenty-two. 17 < 22

Is twenty-three greater than twenty-four? :: No. Twenty-three is not greater than twenty-four. Twenty-three is less than twenty-four. 23 < 24

Is twenty-five greater than twenty-one? :: Yes. Twenty-five is greater than twenty-one. 25 > 21

Is thirteen greater than fourteen? :: No. Thirteen is not greater than fourteen. Thirteen is less than fourteen.

Is one plus four less than six? :: Yes. One plus four is less than six. 1 + 4 < 6

Is five plus three less than ten? :: Yes. Five plus three is less than ten. 5 + 3 < 10

Is seven plus six greater than thirteen? :: No. Seven plus six is not greater than thirteen. Seven plus six is equal to thirteen. 7 + 6 = 13

Is eight plus eight greater than seventeen? :: No. Eight plus eight is not greater than seventeen. Eight plus eight is equal to sixteen. 8 + 8 = 16

Is twenty-two plus three greater than twenty-four? :: Yes. Twenty-two plus three is greater than twenty-four.

Is one plus two equal to two plus one? :: Yes. One plus two is equal to two plus one. 1 + 2 = 2 + 1

Is three plus four equal to four plus three? :: Yes. Three plus four is equal to four plus three. 3 + 4 = 4 + 3

Is five plus five equal to twenty minus ten? :: Yes. Five plus five is equal to twenty minus ten. 5 + 5 = 20 – 10

Is sixteen plus four equal to twenty-five minus five? :: Yes. Sixteen plus four is equal to twenty-five minus five. 16 + 4 = 25 – 5

Is nineteen minus two equal to seventeen minus zero? :: Yes. Nineteen minus two is equal to seventeen minus zero. 19 – 2 = 17 – 0

**New Vocabulary:** true, or, false, answer.

True or False? One plus one is two. :: True. One plus one is two. 1 + 1 = 2

True or False? Two and two are four. :: True. Two and two are four. 2 + 2 = 4

True or False? One take away one is zero. :: True. One take away one is zero. 1 – 1 = 0

True or False? Two and three make five. :: True. Two and three make five. 2 + 3 = 5

True or False? Five take away four is two. :: False. Five take away four is not two. Five take away four is one. 5 – 4 = 1

True or False? Seven and three make eleven. :: False. Seven and three do not make eleven. Seven and three make ten. 7 + 3 = 10

True of False? Three take away zero is three. :: True. Three take away zero is three. 3 – 0 = 0

True or False? Eight and six make thirteen. :: False. Eight and six do not make thirteen. Eight and six make fourteen. 8 + 6 = 14

True or False? Nine take away five is three. :: False. Nine take away five is not three. Nine take away five is four. 9 – 4 = 5

True or False? Nineteen plus three makes twenty-four. :: False. Nineteen plus three does not make twenty-four. Nineteen plus three makes twenty-one. 19 + 3 = 21

Is one plus two greater than or less than one plus three? Less than. One plus two is less than one plus three. 1 + 2 < 1 + 3

Is eight plus three greater than or less than five plus seven? Less than. Eight plus three is less than five plus seven. 8 + 3 < 5 + 7

Is six plus fifteen greater than or less than twenty-four minus four? Greater than. Six plus fifteen is greater than twenty-four minus four. 6 + 15 > 20 – 4

Is twenty-five minus twenty-three greater than or less than twenty-one minus twenty? Greater than. Twenty-five minus twenty-three is greater than twenty-one minus twenty.

Is twenty-one minus sixteen greater than or less than twenty-two minus eighteen? Greater than. Twenty-one minus sixteen is greater than twenty-two minus eighteen. 21 – 16 > 22 – 18

Is twenty-two minus seven greater than or less than twenty-three minus five? Less than. Twenty-two minus seven is less than twenty-three minus five. 22 – 7 < 23 – 5

Is twenty-five minus fourteen greater than or less than twenty minus thirteen? Greater than. Twenty-five minus fourteen is greater than twenty minus fourteen. 25 – 14 > 20 – 13

True or False? Sixteen minus two equals eighteen minus three. :: False. Sixteen minus two is not equal to eighteen minus three. 16 – 2 ≠ 18 – 3

True or False? Twenty-five minus twenty-one is greater than twenty-three minus eighteen. :: False. Twenty-five minus twenty-one is less than twenty-three minus eighteen. 25 – 21 < 23 – 18

True or False? Nineteen plus five is greater than twenty-two minus zero. :: True. Nineteen plus five is greater than twenty-two minus zero. 19 + 5 > 22 – 0

True or False? Sixteen minus five is greater than eighteen minus nine. :: True. Sixteen minus five is greater than eighteen minus nine. 16 – 5 > 18 – 9

True or False? Twenty-three minus ten is equal to twenty-two minus eight :: False. Twenty-three minus ten is not equal to twenty-two minus eight. 23 – 10 ≠ 22 – 8