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16) 3.88 x 10 = 3<br />
17) 3004 = ____4__<br />
18) 0.021 = _____2_<br />
19) 240 = ___2<br />
20) 500 = 1<br />
For addition and subtraction, look at the decimal portion (i.e., to the right of the decimal point) of the<br />
numbers ONLY. Here is what to do:<br />
1) Count the number of significant figures in the decimal portion of each number in the problem. (The<br />
digits to the left of the decimal place are not used to determine the number of decimal places in the<br />
final answer.)<br />
2) Add or subtract in the normal fashion.<br />
3) Round the answer to the LEAST number of places in the decimal portion of any number in the<br />
problem.<br />
Solve the Problems and Round Accordingly...<br />
1) 43.287 + 5.79 + 6.284 = _______<br />
2) 87.54 - 3.3 = _______<br />
3) 99.1498 + 6.5397 + 9.7 = _______<br />
4) 5.868 - 5.1 = _______<br />
5) 59.9233 + 86.21 + 99.396 = _______<br />
6) 7.7 + 26.756 = _______<br />
7) 66.8 + 2.3 + 4.8516 = _______<br />
8) 9.7419 + 43.545 = _______<br />
9) 4.8976 + 48.4644 + 1.514 = _______<br />
10) 4.335 + 35.85 = _______<br />
11) 9.448 - 1.7 = _______<br />
12) 75.826 - 8.6555 = _______<br />
13) 57.2 + 23.814 = _______
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