Question

3. Grupeaza factorii pentru a calcula rapid. 4x93x25 20x43x5x1 15x50x4x2 2x50x16x2 150x7x2x5 137x15x2

Answer 1

4×93×25 = 4×25×93 = 100×93 = 9 300

20×43×5×1 = 20×5×43 = 100×43 =4 300

15×50×4×2 =4×50×2×15 = 200×30 = 6 000

2×50×16×2 = 2×2×50×16 = 4×50×16 = 200×16 = 3200

150×7×2×5 = 150×70 = 10 500

137×15×20 =137×300 = 41 100

Answer 2

4×93×25 = ( 4×25) ×93 = 100 × 93 = 9 300
20×43×5×1 =( 20×5) × (43×1) = 100×43 = 4 300
15×50×4×2 = (50×2)×(15×4) = 100×60 = 6 000
2×50×16×2 = (2×2×50)×16 = 200×16 = 3 200
150×7×2×5 = 150× ( 2×5×7) = 150× 70 = 10 500
137×15×2 = 137× ( 15×2) = 137 × 30 = 4 110