multiply 4-digits by 1-digit - white rose maths · 2020. 4. 29. · 1 complete the sentences to...
TRANSCRIPT
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1 Completethesentencestodescribethemultiplication.
Th H T O
1,000
1,000 100
100 10
1 1 1
1,000
1,000 100
100 10
1 1 1
1,000
1,000 100
100 10
1 1 1
Thereare onesaltogether.
Thereare tensaltogether.
Thereare hundredsaltogether.
Thereare thousandsaltogether.
2,213×3=
2 Completethemultiplication.
Useaplacevaluecharttohelpyou.
2 1 0 2
× 4
3 Afootballstadiumholds2,214people.
Thestadiumisfullfor4matchesinarow.
Whatwastheattendanceforall4matches?
4 Nijahiscalculating2,430×3
Shemakesthisplacevaluecharttohelpher.
Th H T O
100
100 10
10
10
10
1 1 1
100
100 10
10
10
10
1 1 1
100
100 10
10
10
10
1 1 1
Shegetstheanswer729
WhatmistakehasNijahmade?
Whatisthecorrectanswer?
5 Completethemultiplications.
a) 3,126×3= c) 4,132×6=
b) 4,812×2= d) 1,502×5=
6 Ronisworkingout7,423×0
DoyouagreewithRon?
DidRonhavetouseacolumnmethod?Isthereaquickerway?
Multiply4-digitsby1-digit
©WhiteRoseMaths2019
The answer is 7,423
7 4 2 3
× 0
7 4 2 3
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7 Workoutthesemultiplications.
2,846×2
2,846×4
2,846×8
Whatdoyounoticeabouttheanswers?
8 248×10=2,480
Withoutusingtheformalmethod,howcouldyouusethisfactto
calculate248×9?
Checkyouranswerusingtheformalmethod.
Whichmethodwaseasier?
9 Useeachdigitcardoncetowriteamultiplication.
2 3 4 51
×
Howmanydifferentproductscanyoufind?
Whatistheclosestproductto8,000?
Multiply4-digitsby1-digit
©WhiteRoseMaths2019
4 Nijahiscalculating2,430×3
Shemakesthisplacevaluecharttohelpher.
Th H T O
100
100 10
10
10
10
1 1 1
100
100 10
10
10
10
1 1 1
100
100 10
10
10
10
1 1 1
Shegetstheanswer729
WhatmistakehasNijahmade?
Whatisthecorrectanswer?
5 Completethemultiplications.
a) 3,126×3= c) 4,132×6=
b) 4,812×2= d) 1,502×5=
6 Ronisworkingout7,423×0
DoyouagreewithRon?
DidRonhavetouseacolumnmethod?Isthereaquickerway?
The answer is 7,423
7 4 2 3
× 0
7 4 2 3