Do this exercise without using a calculator
1. Calculate
|
(a) 3.2 + 4.9 |
(d) 10.2 + 3.6 + 4.5 |
(g) 10.2 − 8.45 |
|
(b) 0.36 + 5.4 |
(e) 8.6 − 3.4 |
(h) 181.9 − 91.452 |
|
(c) 121.76 + 5.324 |
(f) 1.95 − 0.41 |
(i) 3.52 − 1.34 + 4.36 |
2.Calculate:
|
(a) 0.7 × 0.5 |
(e) 5.61 × 100 |
(i) 48.72 ÷ 0.4 |
|
(b) 1.3 × 5 |
(f) 0.6 × 1000 |
(j) 41.28 ÷ 0.86 |
|
(c) 3.17 × 2.6 |
(g) 4.5 ÷ 5 |
(k) 18.32 ÷ 10 |
|
(d) 61.7 × 5.2 |
(h) 16.2 ÷ 8.1 |
(l) 0.6 ÷ 100 |
3.(a) Find the sum of 7.3, 8.45 and 0.62
(b) What is 1312.7 less 861.5 ?
(c) What is the product of 1.7 and 6.2 ?
(d) How many pieces of wood 5.6 cm long can be cut from a plank of wood 67.2 cm in length ?
(e) What is the perimeter of a square of side length 8.6 m ?
(f) Find the cost of 21 kg of apples at $1.65 per kg.
4. Calculate:
|
(a) 3.6 − (4.5 + 2.3) |
(d) 1.68(0.4 + 0.2) |
|
(b) 4.8 + 3.6 × 2 |
(e) 5.32 − 2.34 |
|
(c) 5 × 0.2 + 3 × 0.4 |
(f) 56.7 − 2.9 × 2.32 |
