10 10 10 10 10 10 10 3 10 10 10 10 10 10 10...3 × 3 ones = 3 × 2 tens = + = 3 × 23 = There are...
Transcript of 10 10 10 10 10 10 10 3 10 10 10 10 10 10 10...3 × 3 ones = 3 × 2 tens = + = 3 × 23 = There are...
-
Multiply 2-digits by 1-digit (1)
1 Ron,EvaandMoeachhave23marbles.
Tens Ones
10 10 10 10 10 10 10
10 10 10 10 10 10 10
10 10 10 10 10 10 10
Howmanymarblesarethereintotal?
3×3ones=
3×2tens=
+ =
3×23=
Thereare marblesintotal.
2 Usetheplacevaluecharttoworkout2×24
Completethemultiplicationsentences.
Tens Ones
10
10 1 1 1 1
10
10 1 1 1 1
2×4=
2×20=
2×24=
3 Annieworksout43×2=86
Tens Ones
10
10
10
10 1 1 1
10
10
10
10 1 1 1
T O
4 3
× 2
8 6
TalkaboutAnnie’smethodswithapartner.
Whatisthesame?Whatisdifferent?
4 Completethemultiplications.
a)
T O
2 4
× 2
b)
T O
4 4
× 2
©WhiteRoseMaths2019
-
7 Whitneyhasmultiplieda2-digitnumberbya1-digitnumber.
WhatnumbersisWhitneymultiplying?
Fillinthemissingdigits.
×
3 9
8 Filipusedthecolumnmethodtoworkout41×2
4 1
× 2
a) HowdoyouthinkEvawillworkthisoutinherhead?
b) Tickthemultiplicationsthatyoucanworkoutin
yourhead.
c) 31×3 d) 42×2
Compareanswerswithapartner.
5 Jackistryingtoworkout34×2usingthecolumnmethod.
2
× 3 4
ShowhowJackcouldimprovehiscolumnmethodand
workouttheanswer.
6 Onetoastercosts£32
Howmuchdo3toasterscost?
©WhiteRoseMaths2019
4×22
12×4
3×23
3×32
3×33
4×20
I’m not sure what to do.
I had to do 30 + 9 = 39 to get
my answer.
I can work this multiplication out in
my head.
£32