Question 30 of 43intermediate🔧 ApplyNumerical5 marks

Calculate these products quickly. (a) 25×1225 \times 12 = _____ (b) 25×24025 \times 240 = _____ (c) 250×120250 \times 120 = _____ (d) 2500×122500 \times 12 = _____ (e) _____ × _____ = 120000000

(a)
Answer

300

(b)
Answer

6000

(c)
Answer

30000

(d)
Answer

30000

(e)
Answer

Multiple answers: 12000×1000012000 \times 10000 or 1200×1000001200 \times 100000 or 12×1000000012 \times 10000000

Explanation

(a) 25×1225 \times 12 = 25×425 \times 4 × 3 = 100×3100 \times 3 = 300 (b) 25×24025 \times 240 = 25×425 \times 4 × 60 = 100×60100 \times 60 = 6000 (c) 250×120250 \times 120 = 250×4250 \times 4 × 30 = 1000×301000 \times 30 = 30000 (d) 2500×122500 \times 12 = 2500×42500 \times 4 × 3 = 10000×310000 \times 3 = 30000 (e) Students can create various factor pairs that multiply to give 120000000

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