wordprobs3
TRANSCRIPT
A new armchair costs £781. Christine has saved £308. How
much more does she need to save to buy the armchair?
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
This is a subtraction sum!
£225 - £87 =
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
Firstly, put the numbers you are going to use on the number line.
£781£308
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
Then, count on to the nearest ‘easy’ number
£781£308 £310
+2
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
…..and again
£781£308 £310
+2 +90
£400
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
…..keep going…..
£781£308 £310
+2 +90
£400
+300
£700
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
…..you’re not finished yet!…..
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
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• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
…..one more step…..!
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
+1
_______________________
• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
…..Excellent !
….but are we finished yet?
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
+1
_______________________
• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
2+90+300+80+1 =
(Let’s make it easier though shall we?)
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
+1
_______________________
• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
300+90+80+2+1=
(Let’s make it easier though shall we?)
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
+1
_______________________
• A new armchair costs £781. Christine has saved £308. How much more does she need to save to buy the armchair?
300+90+80+2+1= 473(Let’s make it easier though shall we?)
£781£308 £310
+2 +90
£400
+300
£700
+80
£780
+1