Find easy ways of solving these problems. (a) 16 × 25 (b) 12 × 125 (c) 24 × 250 (d) 36 × 25 (e) 28 × 75 (f) 300 × 15 (g) 50 × 78 (h) 199 × 63 (i) 128 × 35

(i) 4480 (a) 400 (b) 1500 (c) 6000 (d) 900 (e) 2100 (f) 4500 (g) 3900 (h) 12537 — (a) 16 × 25 = 16 × 100 ÷ 4 = 400 (b) 12 × 125 = 12 × 1000 ÷ 8 = 1500 (c) 24 × 250 = 24 × 1000 ÷ 4 = 6000 (d) 36 × 25 = 36 × 100 ÷ 4 = 900 (e) 28 × 75 = 28 × 300 ÷ 4 = 2100 (f) 300 × 15 = 4500 (g) 50 × 78 = 3900 (h) 199 × 63 = 200 × 63 - 63 = 12537 (i) 128 × 35 = 4480

Find easy ways of solving these problems. (a) 16 × 25 (b) 12 × 125…

Question 35 of 47intermediate🔧 ApplyNumerical9 marks

Find easy ways of solving these problems. (a) $16 \times 25$ (b) $12 \times 125$ (c) $24 \times 250$ (d) $36 \times 25$ (e) $28 \times 75$ (f) $300 \times 15$ (g) $50 \times 78$ (h) $199 \times 63$ (i) $128 \times 35$

(i)

Answer

4480

(a)

Answer

400

(b)

Answer

1500

(c)

Answer

6000

(d)

Answer

900

(e)

Answer

2100

(f)

Answer

4500

(g)

Answer

3900

(h)

Answer

12537

Explanation

(a) $16 \times 25$ = $16 \times 100$ ÷ 4 = 400 (b) $12 \times 125$ = $12 \times 1000$ ÷ 8 = 1500 (c) $24 \times 250$ = $24 \times 1000$ ÷ 4 = 6000 (d) $36 \times 25$ = $36 \times 100$ ÷ 4 = 900 (e) $28 \times 75$ = $28 \times 300$ ÷ 4 = 2100 (f) $300 \times 15$ = 4500 (g) $50 \times 78$ = 3900 (h) $199 \times 63$ = $200 \times 63$ - 63 = 12537 (i) $128 \times 35$ = 4480

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