My+Maths

23. 05. 13

Place Value :)

1) 54 + 26 = 80 50 + 20 =70  4 + 6 =10  70 + 10 =80

2) 587 - 363 = 500 - 300 =200  80 - 60 =20  7 - 3 =4  200 + 20 + 4 =224

Equal Addition :) 1) 568 + 88 = 480 568 + 2 = 570 88 + 2 = 90  570 - 90  570 -30 = 540 - 30 = 510 - 30 = 480

2) 842 - 52 = 790 842 - 2 = 840  52 - 2 = 50  840 - 50 = 790

Algorithms 1) 56 73 -  23  2) 43  56 +  99  3) 87  65 -  22  4) 68  52 +  11