Place Value
Multiply 0.804 by 100.
80.4
Round 6.2 to the nearest whole number.
6
6 − 9?
−3
(−4) × 4
-16
A rope is 3.6 metres long. A student cuts it into pieces that are each 10 times shorter. How long is each piece?
3.6÷10=0.36 m
Divide 7.2 by 1000.
0.0072
Round 4.67 to one decimal place
4.7
−4 − 7
-11
(−9) × (−3)
27
The temperature was −2∘C in the morning. It dropped by 5 degrees. What is the new temperature?
−2−5=−7∘C
0.834 x ? = 84.3
Round 9.843 to two decimal places.
15 − (−8)
5 x -3 ÷ 3
-5
A shop records a price as $14.678. Round this to two decimal places for the receipt.
$14.68
Multiply 0.062 by 1000
62
56.954 rounded to 1 decimal place
57.0
−6 + 4 −(−3) + (−8)
−6+4=−2
−2−(−3)=1
1+(−8)=−7
Final answer: −7
(−3) × 4 ÷ (−2)
(−3×4) = −12
−12÷(−2) = 6
Final answer: 6
A submarine is at −120 metres. It rises 45 metres, then drops 30 metres, then rises 20 metres. What is its final depth?
−120+45=−75
−75−30=−105
−105+20=−85
Final depth: −85 m
0.4 x 10 ÷ 1000
0.004
Round 3.995 to two decimal places.
4.00
−12 −(−5)+(−9)−7+(−4)
−12−(−5)=−7
−7+(−9)=−16
−16−7=−23
−23+(−4)=−27
Final answer: −27
(−5) × (−6) ÷ 3 × (−2)
(−5×−6) =30
30÷3=10
10×(−2) =−20
Final answer: −20
A scientist records three temperature changes during an experiment:
It increases by 4 degrees
Then decreases by 3 times that amount
Then increases by 10 degrees
What is the total temperature change?
Answer: Increase: +4 Decrease: 3×4=12, so change is −12 Final increase: +10
Total: 4−12+10=2
Final answer: +2 degrees