754 + 66 add 2-digit and 3-digit numbers – crossing 10 or ... · 8 2 6 1 what mistake has ron...
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Add 2-digit and 3-digit numbers – crossing 10 or 100
1 Usetheplacevaluecharttoworkout328+36
H T O
2 Workouttheadditions.
a)572+45
H T O
100
100
100
100
100
10
10
10
10
10
10
10
1 1
10
10
10
10
1 1
1 1
1
H T O
5 7 2
+ 4 5
b)754+66
H T O
100
100
100
100
100
100
100
10
10
10
10
10
1 1
1 1
10
10
10
10
10
10
1 1
1 1
1 1
H T O
7 5 4
+ 6 6
3 Workouttheadditions.
a)H T O
1 7 5
+ 7 2
b)H T O
3 0 7
+ 8 4
c)35kg+239kg
d)845+72
e)436+85
f)£739+£68
©WhiteRoseMaths2019
H T O
3 2 8
+ 3 6
+
+
+
7 Mousesanumberlinetoworkoutanaddition.
400 418
+ 60 + 2 + 5
478 480 485 500
WhatadditionhasMoworkedout?
+ =
8 Usethenumberlinestocompletetheadditions.
a)235+47=
133 134 135200 300
b)235+87=
133 134 135200 300 400
4 Ronworksout476+35
4 7 6 + 3 5 8 2 6 1
WhatmistakehasRonmade?
Workoutthecorrectanswer.
5 Alexcollectsstickers. White Rose FC
Shehascollected286stickers.
Sheonlyneeds69morestickersto
fillthealbum.
Howmanystickersdoesthealbumholdwhenfull?
6 Herearesomedigitcards.
3 72 5 8
Arrangethedigitstomaketwodifferentadditionsthathave
justoneexchange.
H T O
+
H T O
+
©WhiteRoseMaths2019
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