adding and subtracting 1
adding and subtracting 2
open number sentences
equivalent number sentences
flying solo
100
-7+ (-8)=
-15
100
-21+(-2)=
-23
100
____ + -16 = -22
-6
100
this number sentence -5-4 is equivalent to
-5+(-4)
100
-32+-43=
-75
200
-8-(-5)=
-3
200
38+(-9)=
29
200
43+____ = 5
-38
200
this number sentence -15-46 is equivalent to
-15+(-46)
200
-65+____=-15
50
300
-25 - (-16)=
-9
300
-41-(+9)=
-50
300
____ -(-12)= -20
-32
300
this number sentence -39+ 34 is equivalent to
-39 -(-34) or 34-39
300
-6-____=57
-63
400
Use the vertical number line to model each problem. A hot air balloon started at a height of -31. Then it removed 17 sandbags. What is its new height?
-14
400
Use the vertical number line to model each problem. A hot air balloon started at a height of -23. Then it removed 18 sandbags. What is its new height?
-5
400
-39-____ = 13
-52
400
this number sentence -21-(-19)is equivalent to
-21+19 or 19-21
400
Use the vertical number line to model each problem. A hot air balloon started at a height of -43. Then it removed 19 sandbags. What is its new height?
-24
500
-13+(-21)-(-10)=
-24
500
-27-(-13)-40=
-54
500
-25-____ - (-16)= -14
5
500
this number sentence 9-(-5)- (-57) is equivalent to
9+5+57
500
-(-3)-45-(-34)=
-8
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