2180
ARITHMETIC
Change to lowest terms: 11- II, W, II, i¥r
12. m, A'v, ^r, ii
is. y&, ito, ite, T&V 14. rffr, ft, 41, It
15. if, m, m, m
Addition:
21- f + T7n + i + l
22. 12f + 20f + 152T%
23. 205f + 56| + 99f
24. 51 + 291 + 1^ + 49
25. 201f + 52i + 76^V
Multiplication .-
31. HiXf
32. AXfXH
33. ^ X A X ii X 3^ X 4|
34. &XSX*Xl5i
35. |? X if X 3f X 10«
Change to other forms:
16. 69f, ^f, A|^a
17. 57$, 607$, 48|
18. 24A, 66f, W
19. 362i ^, ^|A
20. AJA, i|-p
Subtraction:
26. 78| — 27-|f
27. 24f —5f
28. 18 i —12|
29. 281 —12T%
30. 72 — 15J
Division:
36. 171 ™ 21
37. 45| -r- 3^V
38. A of 2| -r- f of 8|
39. 7i^-f
40. 13f -f- 25
TABLES OF MEASURE.
LENGTH OE DISTANCE.
12 inches (in. or ") =1 foot
(ft. or 0
3 feet = l yard (yd.) 5i/2 yd. or 161/2 ft. = l rod (rd.) 320 rods 5280
f— 1 statute mile (mi.)
4 inches = 1 hand 6 feet = 1 fathom
1.15 common 1__ 1 nautical mile
miles J 1 geographical mile 3 knots = 1 league 1 league = 3 geographical miles
SUEFACE.
144 square inches (sq. in.) =1 square foot (sq. ft.)
9 square feet = 1 square yard (sq. yd.) lQi/4 square yards or 272^ square feet = l square rod (sq. rd.)
160 square rods = l acre (A.) 640 acres = 1 square mile (sq. mi.)
1 square mile = 1 section
36 square miles = 1 township
100 square feet = 1 square of flooring, shingles, slating, or roofing.
A surface has two dimensions, length and breadth. A rectangle is a plane surface bounded by four straight lines, and having all its angles right angles.
