Wednesday, 6 April 2016

Prove it to move it

LI Can I add and subtract groups of ten by using simple addition facts?

63-40=23
6-4=2
60-40=20
20+3

49+50=99
4+5=9
40+50=90
90+9

27+40=67
2+4=6
20+40=60
7+60

65-50=15
6-5=1
60-50=10
10+5

40+48=88
4+4=8
40+40=80
8+80



1 comment:

  1. Wow you must be very smart Corbin in your math.

    ReplyDelete