WALT: Sovle mulitiplication problem using various strategies
Problem
|
Strategy
|
Answer
|
28x9
|
20x9=180
8x9=72
180+72=252
|
252
|
59x15
|
50x10=500
50x5=250
9x10=90
9x5=45
500+250+90+45=885
|
885
|
43x7
|
40x7=280
3x7=21
301
|
301
|
81x9
|
80x9=720
1x9=9
720+9=729
|
729
|
62x17
|
60x10=600
60x7=420
2x10=20
2x7=14
600x420+20+14=1054
|
1054
|
39x15
|
30x10=300
30x5=150
9x10=90
9x5=45
300+150+90+45=585
|
585
|
87x9
|
80x9=720
7x9=63
720+63=783
|
783
|
67x33
|
60x30=1800
60x3=180
7x30=210
3x3=9
1800+180+210+9=2211
|
2211
|
63x7
|
60x7=420
3x7=21
441
|
441
|
75x9
|
70x9=630
5x9=45
675
|
675
|
55x10
|
50x10=500
5x10=50
500+50=550
|
550
|
92x9
|
90x9=810
2x9=18
810+18=828
|
828
|
53x8
|
50x8=400
3x8=24
400+24=424
|
424
|
92x5
|
90x5=450
2x5=10
450+10=460
|
460
|
41x9
|
40x9=360
1x9=9
360+9=369
|
369
|
72x7
|
70x7=490
2x7=14
490+14=504
|
504
|
91x8
|
90x8=720
1x8=8
720+8=728
|
728
|
33x9
|
30x9=270
3x9=27
270+27=297
|
297
|
No comments:
Post a Comment
Note: only a member of this blog may post a comment.