Tính: a) 500 mm + 250 mm = ..................... 700 cm – 280 cm = ..................... 300 mm ´ 3 = .....................
Giải thích
a)
500 mm + 250 mm = 750 mm 300 mm × 3 = 900 mm | 700 cm – 280 cm = 420 cm 900 cm : 6 = 150 cm |
b)
180 g + 220 g = 400 g |
| 120 g × 8 = 960 g |
|
500 g – 200 g = 300 g |
| 750 g : 5 = 150 g |
|
c)
200 ml + 450 ml = 650 ml 800 ml – 430 ml = 370 ml | 230 ml × 4 = 920 ml 1 000 ml : 5 = 200 ml |