Question

missing symbols: mixed decimal operations
if one of the symbols makes the equation true, circle it. if neither symbol makes the
equation true, circle
either\ and write a correct equation using two of the given numbers.
1 4.32 ____ 6.54 = 10.86
+ × neither
2 16.524 ____ 9.35 = 7.174
− ÷ neither
3 2.3 ____ 5.4 = 12.42
+ × neither
4 38.48 ____ 5.2 = 7.4
− ÷ neither
5 25.82 ____ 14.34 = 11.52
− ÷ neither
6 13.2 ____ 5.2 = 68.64
+ × neither
7 49.92 ____ 6.4 = 7.8
− ÷ neither
8 4.7 ____ 8.9 = 418.3
+ × neither
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Explanation:

Step1: Check addition

Calculate \(4.32 + 6.54\).
$$4.32+6.54 = 10.86$$

Step2: Check subtraction

Calculate \(16.524-9.35\).
$$16.524 - 9.35=7.174$$

Step3: Check multiplication

Calculate \(2.3\times5.4\).
$$2.3\times5.4=(2 + 0.3)\times5.4=2\times5.4+0.3\times5.4=10.8+1.62 = 12.42$$

Step4: Check division

Calculate \(38.48\div5.2\).
$$38.48\div5.2=\frac{384.8}{52}=7.4$$

Step5: Check subtraction

Calculate \(25.82-14.34\).

$$25.82-14.34 = 11.48 eq11.52$$

Calculate \(25.82\div14.34\approx1.8
eq11.52\)

Step6: Check multiplication

Calculate \(13.2\times5.2\).
$$13.2\times5.2=(13 + 0.2)\times5.2=13\times5.2+0.2\times5.2=67.6+1.04 = 68.64$$

Step7: Check division

Calculate \(49.92\div6.4\).
$$49.92\div6.4=\frac{499.2}{64}=7.8$$

Step8: Check multiplication

Calculate \(4.7\times8.9\).

$$4.7\times8.9=(4 + 0.7)\times8.9=4\times8.9+0.7\times8.9=35.6+6.23=41.83 eq418.3$$

Calculate \(4.7 + 8.9=13.6
eq418.3\)

Answer:

1. \(+\)
2. \(-\)
3. \(\times\)
4. \(\div\)
5. neither
6. \(\times\)
7. \(\div\)
8. neither