slip `n slide

SLIP ’N SLIDE
NUMBER SENSE
OBJECTIVE: Students will reinforce and practice two digit
addition and subtraction.
N
SUPPLIES:
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
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Slip ’n Slide activity board
2 Slip ’n Slide equation boards
Slip ‘n Slide card set
2 disc counters
Marker
APPROXIMATE TIME: 10 to 15 minutes
TEACHING TIPS:
Students will add and subtract two-digit numbers using the Slip ‘n Slide equation board. Attention is given to adding and subtracting groups of tens and ones separately. Students will
be given a start number with directions to move vertically and horizontally on the board.
Vertical moves up (climb) and down (slide) represent the addition and subtraction of groups
of ten. Horizontal moves (slips) represent the addition or subtraction of ones. A slip to the
right represents addition and a slip to the left represents subtraction.
After students follow the directions and reach the ending number, they must create an addition or subtraction
equation that represents the moves on the board. See
examples.
I started at 26. I climbed
up 5 spaces (50) and
slipped to the right 7 spaces. I moved a total of 57. I
ended on 83.
When I slipped 7 spaces
right I had to move up to the
next row.
N EQU
ADD ITIO
It is important that students
understand that climbs
and right slips are additions and slides and left
slips are subtractions.
OARD
B
ATION
? GUIDED QUESTIONS: TO PROMOTE CRITICAL THINKING AND PROBLEM SOLVING
Use the activity board to solve these problems: 26 + 59 = ?
85 - 34 = ?
63 - 27 = ?
Make up your own addition and subtraction problems for others to solve.
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©MANGO Math Group 2009
SLIP ’N
SLIDE
An Activity for 2 Students
1
Students will need a Slip n’ Slide activity
board, 2 Slip n’ Slide equation boards
(addition and subtraction), Slip n’ Slide
card set, 2 disks and 2 markers.
5
The other student places a disk on the
start number, follows the directions being
read and places a second disk on the
ending number.
2
Students will work together to find the
sums or differences of two numbers by
climbing (moving up), sliding (moving
down) and slipping (left or right) on the
activity board.
6
Together students make an equation that
represents the climbs/slides and slips.
3
Place deck of cards face down in middle
of playing area.
4
One student draws a Slip n’ Slide card
and reads it out loud to the other student.
20
30
40
4
3
2
SLIDE 40
10
I started at 76. I
slid 4 spaces
(40) and slipped
left 4 spaces for
a total of 44. I
ended on 32.
 Climbing and slipping to the right
represent addition.
 Sliding and slipping to the left represent subtraction. See example below.
7
Write down equation on the correct
equation board.
8
Clear activity board, draw another card
and play again.
9
When one of the equation boards is full
the activity ends.
SUBTRACTION EQUATION BOARD
1
SLIP 4
©MANGO Math Group 2009
SLIP ’N SLIDE
ERASE BOARD WHEN DONE.
ADDITION EQUATION BOARD
+
=
+
=
+
=
+
=
+
=
©MANGO Math Group 2009
SLIP ’N SLIDE
SUBTRACTION EQUATION BOARD
ERASE BOARD WHEN DONE.
-
=
-
=
-
=
-
=
-
=
©MANGO Math Group 2009
Start at
98
Start at
73
67
70
50
40
5
2
6
SLIP N’ SLIDE
SLIP N’ SLIDE
Start at
Start at
52
Start at
87
SLIP N’ SLIDE
Start at
20
60
10
7
9
4
SLIP N’ SLIDE
Start at
65
SLIP N’ SLIDE
SLIP N’ SLIDE
Start at
86
32
Start at
69
30
30
40
8
4
7
SLIP N’ SLIDE
SLIP N’ SLIDE
SLIP N’ SLIDE
Start at
23
Start at
61
10
80
5
8
7
37
SLIP N’ SLIDE
Start at
17
SLIP N’ SLIDE
Start at
50
40
30
2
8
9
SLIP N’ SLIDE
Start at
12
60
SLIP N’ SLIDE
Start at
Start at
28
SLIP N’ SLIDE
SLIP N’ SLIDE
Start at
54
42
Start at
35
60
20
40
4
7
8
SLIP N’ SLIDE
SLIP N’ SLIDE
SLIP N’ SLIDE