Solution of Exercise 1C (chapter 1 Number system) of class 6 math (Collins)

Exercise - 1 C

i. Convert into metre.

a. 500 cm = 5m

b. 700000 mm = 700 m

c. 342 km = 342000 m

d. 67 hm = 6700 m

e. 81 dam = 810 m

ii. Convert into km

a. 600000 cm = 6 km

b. 90000 dm = 9 km

c. 520 hm = 52 km

d. 4000 dam = 40 km

e. 40000 m = 40 km

iii. Convert into cm

a. 72 m = 7200 cm

b. 500 mm = 50 cm

c. 20 dam = 20000 cm

d. 52 hm = 520000 cm

e. 3700 mm = 370 cm

2. Simplify the following.

a. 19 + 2 x 11 + 6 x 2 = 19 + 22 + 12 = 53

b. 15 / 5 of 3 x 9 = 15 / 15 x 9 = 1 x 9 = 9

c. (17-7) of 12 - 10 (17-5) = 10 of 12 - 10 x 12 = 120 - 120 = 0

d. 1 + 5 / 1 of 5 - 1 = 1 + 5 / 5 - 1 = 1 + 1 - 1 = 1

e. 284 - 14(296- 276) = 284 - 14 x 20 = 284 - 280 = 4