Question:

Perform the indicated operation. Show your solution.

1. 3.56+213.01

 213.01

   +3.56

─────

  216.57  → answer

2. 31/15-28/15

= (31-28) / 15

= 3 / 15

= 1/5  → answer

3. 2/21-3/4

= 2 (4) / 21(4) - 3(21) / 4(21)

= 8/64 - 63/84

= (8-63) / 84

= - 55 / 84  → answer

4. 21.102-2.596

  21.102

  -2.596

──────

  18.506  → answer

5. 16/12+9/24

= 16(2) / 12(2) + 9/24

= 32 /24 + 9/24

= (32 + 9) / 24

= 1  17/24  → answer

6. 0.25-0.76

 0.25

-0.76

────

- 0.51  → answer

7. 92/12+87/12

= (92+87) / 12

= 14  11/12  → answer

8. 48/1-3/1

= 48 - 3

= 45  → answer

9. 871.003+12.300

 871.003

 +12.300

──────

883.303  → answer

10.a 39/13 - 12/18​

= 39(18) / 13(18) - 12(13) / 18(13)

= 702/234 - 156/234

= (702 - 156) / 234

= 546 / 234

= 2  1/3  → answer

10.b 3913 - 12/18​

= 3913 - 2/3

= 3912  1/3   → answer

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