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McGraw-Hill Math Grade 7 Answer Key Lesson 19.1 Metric Units of Length
Exercises
CALCULATE
Question 1.
335 cm = ___________ m
Answer:
335 cm is equal to 3.35 m.
Explanation:
Conversion:
1 m = 100 cm.
?? m = 335 cm
=> 1 × 335 = 100 × ??
=> 335 ÷ 100 = ??
=> 3.35 m = ??
Question 2.
6235 mm = ___________ m
Answer:
6,235 mm is equal to 6.235 m.
Explanation:
Conversion:
1 m = 1,000 mm.
?? m = 6,235 mm
=> 1 × 6,235 = 1,000 × ??
=> 6235 ÷ 1000 = ??
=> 6.235 m = ??
Question 3.
5.761 km = ___________ cm
Answer:
5.761 km is equal to 5,76,100 cm.
Explanation:
Conversion:
1 km = 1,00,000 cm
5.761 km = ?? cm
=> 1 × ?? = 1,00,000 × 5.761
=> ?? = 5,76,100 cm.
Question 4.
725.02 km = ____________ mm
Answer:
725.02 km is equal to 72,50,20,000 mm.
Explanation:
Conversion:
1 km = 10,00,000 mm.
725.02 km = ?? mm.
=> 1 × ?? = 10,00,000 × 725.02
=> ?? = 72,50,20,000 mm.
Question 5.
335 cm + 550 mm = ____________ m
Answer:
Sum of 335 cm and 550 mm, we get 3.9 m.
Explanation:
Conversion:
1m = 100 cm
?? m = 335 cm
=> 1 × 335 = 100 × ??
=> 335 ÷ 100 = ??
=> 3.35 m = ??
1 m = 1000 mm.
?? m = 550 mm
=> 1 × 550 = 1,000 × ??
=> 550 ÷ 1,000 = ??
=> 0.55 m = ??
-> 3.35m + 0.55m = 3.9m.
Question 6.
2.611 km = ____________ cm
Answer:
2.611 km is equal to 2,61,100 cm.
Explanation:
Conversion:
1 km = 1,00,000 cm.
2.611 km = ?? cm
=> 1 × ?? = 1,00,000 × 2.611
=> ?? = 2,61,100 cm.
Question 7.
12 cm +12 mm = ____________ m
Answer:
Sum of 12 cm and 12 mm, we get .0132 m.
Explanation:
Conversion:
1 m = 100 cm.
?? m = 12 cm
=> 1 × 12 = 100 × ??
=> 12 ÷ 100 = ??
=> 0.12 m.
1 m = 1,000 mm.
?? m = 12 mm.
=> 1 × 12 = 1,000 × ??
=> 12 ÷ 1,000 = ??
=> 0.012 m = ??
-> 0.12m + 0.012 m =Â .0132 m.
Question 8.
6.872 m = __________ mm
Answer:
6.872 m is equal to 6,872 mm.
Explanation:
Conversion:
1 m = 1,000 mm.
6.872 m = ?? mm
=> 1 × ?? = 1,000 × 6.872
=> ?? = 6,872 mm.
Question 9.
8 km + 65 m = ____________ m
Answer:
Sum of 8 km and 65 m, we get 8,065 m.
Explanation:
Conversion:
1 km = 1,000 m.
8 km = ?? m
=> 1 × ?? = 1,000 × 8
=> ?? = 8,000 m.
8,000m + 65m = 8,065 m.
Question 10.
320 km + 415 m = ______________ cm
Answer:
Sum of 320 km and 415 m, we get 3,20,41,500 cm.
Explanation:
Conversion:
1 km = 1,00,000 cm.
320 km = ?? cm
=> 1 × ?? = 1,00,000 × 320
=> ?? = 3,20,00,000 cm.
1 m = 100 cm.
415 m = ?? cm
=> 1 × ?? = 100 × 415
=> ?? = 41,500 cm.
-> 3,20,00,000 cm + 41,500 cm = 3,20,41,500 cm.
Question 11.
478.98 cm + 760.34 cm = ____________ m
Answer:
Sum of 478.98 cm and 760.34 cm, we get 12.3932 m.
Explanation:
Conversion:
1m = 100 cm.
?? m = 478.98 cm
=> 1 × 478.98 = 100 × ??
=> 478.98 ÷ 100 = ??
=> 4.7898 m = ??
1m = 100 cm.
?? m = 760.34 cm
=> 1 × 760.34 = 100 × ??
=> 760.34 ÷ 100 = ??
=> 7.6034 m = ??
-> 4.7898 m + 7.6034 m = 12.3932 m.
Question 12.
540 cm = _____________ km
Answer:
540 cm is equal to 0.0054 km.
Explanation:
Conversion:
1 km = 1,00,000 cm
?? km = 540 cm
=> 1 × 540 = 1,00,000 × ??
=> 540 ÷ 1,00,000 = ??
=> 0.0054 km = ??
Question 13.
45 m + 35 cm = ___________ cm
Answer:
Sum of 45 m and 35 cm, we get 4,535 cm.
Explanation:
Conversion:
1 m = 100 cm.
45 m = ?? cm
=> 1 × ?? = 100 × 45
=> ?? = 4,500 cm.
4,500 cm + 35 cm = 4,535 cm.
Question 14.
76 m + .355 m = ____________ mm
Answer:
Sum of 76 m and .355 m, we get 7,955 mm.
Explanation:
Conversion:
1 m = 1,000 mm.
76 m = ?? mm
=> 1 × ?? = 1,000 × 76
=> ?? = 7,600 mm.
1 m = 1,000 mm.
.355 m = ?? mm
=> 1 × ?? = 1,000 × .355
=> ?? = 355 mm.
7,600 mm + 355 mm = 7,955 mm.
Question 15.
1.1755 km = ______________ m
Answer:
1.1755 km is equal to 1,175.5 m.
Explanation:
Conversion:
1 km = 1,000 m.
1.1755 km= ?? m
=> 1 × ?? = 1,000 × 1.1755
=> ?? = 1,175.5 m.
Question 16.
66.66 cm + 666 cm + 66 m = _____________ m
Answer:
Sum of 66.66 cm, 666 cm and 66 m, we get 73.3266 m.
Explanation:
Conversion:
1 m = 100 cm.
?? m = 66.66 cm
=> 1 × 66.66 = 100 × ??
=> 66.66 ÷ 100 = ??
=> 0.6666 m = ??
1 m = 100 cm.
?? m = 666 cm.
=> 1 × 666 = 100 × ??
=> 666 ÷ 100 = ??
=> 6.66 m = ??
0.6666 m + 6.66 m + 66 m = 73.3266 m.
Question 17.
2104 m = ____________ km
Answer:
2104 m is equal to 2.104 km.
Explanation:
Conversion:
1 km = 1,000 m
?? km = 2104 m
=> 1 × 2,104 = 1,000 × ??
=> 2,104 ÷ 1,000 = ??
=> 2.104 km = ??
Question 18.
1545 cm = _____________ km
Answer:
1545 cm is equal to 0.01545 km.
Explanation:
Conversion:
1 km = 1,00,000 cm.
?? km = 1,545 cm
=> 1 × 1,545 = 1,00,000 × ??
=> 1,545 ÷ 1,00,000 = ??
=> 0.01545 km = ??