Friday, 27 May 2016

Prove it to move it

Maths prove it to move it
L.I can I rearrange an addition problem using groups to solve it more efficiently?

5+35+7+13=                         48+6+4+2=
7+13=20                                6+4=10
5+35=40                                48+2=50
40+20=60                              50+10=60

40+7+3+35=
7+3=10
10+35=45
40+45=85

60+20+5+4=
5+4=9
9+20=29
29+60=89

50+23+12+13=
23+12=35
35+13=48
48+50=98

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