Addition
7+8
15
7-0
7
7x9
63
9 divided by 1
9
an angle that is 90 degrees
right angle
20+17
37
800-250
550
7x12
84
1,000 divided by 10
100
more than 90 degrees
obtuse
900+900
1,800
180-180
0
7x7
49
56 divided by 8
7
less than 90 degrees
acute
1,800+1,800
3,600
600-350
250
100x4
400
5,000,000 divided by 1
5,000,000
180 degrees
straight angle
20,000+46,000
66,000
1,000,000-999,999
1
1x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0x0
0
72 divided by 7
10.2
turn around completly
360 degrees