subtract 2-digit numbers from 3-digit 3 work out the subtractions....
TRANSCRIPT
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Subtract 2-digit numbers from 3-digit numbers – crossing 10 or 100
1 Usebase10tomakethenumber253
Subtract27from253
Hundreds Tens Ones
a) Showapartnerthemethodyouused.
b) Completethecolumnsubtraction.
H T O
2 5 3
– 2 7
2 Workout426–82
H T O
H T O
4 2 6
– 8 2
3 Workoutthesubtractions.
a)
H T O
2 6 5
– 3 8
b)
H T O
1 7 2
– 3 9
c) 538–75
d) 212cm–42cm
e) 413–65
f) 847–79
©WhiteRoseMaths2019
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7 Whitneyusesanumberlinetoshowthat435–78=357
0 100 200 300 400 43578
+ 22 + 335
500
ExplainwhatyouthinkWhitneyhasdone.
8 Workoutthemissingdigits.
a) H T O
4 5
– 2
7 6
b)H T O
3
– 7 8
2 8
9 a) Usethreedifferentmethodstoworkout470–79
Comparemethodswithapartner.
b) Howcanyouworkout500–68inyourhead?
Whatmethoddidyouuse?
4 Afilmisshown3timesinaday.
Thetableshowshowmanychildrenwatcheachshowing.
Showingtime 11am 3pm 7pm
Numberofchildren 462 295 78
Howmanymorechildrenwatchthe11am
showingthanthe7pmshowing?
5 Findthemissingvalues.
a)
728
45
b)
650
38 53
6 Whatmistakeshavebeenmadeinthesecolumnsubtractions?
a) 3 5 7– 2 9 3 3 2
b)
6 0 2– 3 5 4 7 7
45
1 1
©WhiteRoseMaths2019